Answer:
Evolution
Explanation:
evolution is what happens over a long periods of time
You are concerned with surveying the protozoa in the arboretum soil. While most commonly thought to live exclusively in aquatic environments, protozoa can play an important role in the nutrient cycling that takes place in soil. In addition, protozoa can help maintain the proper balance of bacterial populations within soil, as bacteria are a primary source of food for protozoa.
Protozoa are extremely diverse. However, there are three characteristics common to all organisms called protozoa. What are these three characteristics?
Choose the answer that best describes the three characteristics common to all protozoa.
eukaryotic, contain chloroplasts, produce energy via mitochondria
eukaryotic, use cilia for motility, produce energy via mitochondria
eukaryotic, unicellular, lack a cell wall
eukaryotic, reproduce sexually, contain chloroplasts
Answer:
eukaryotic, unicellular, lack a cell wall
Explanation:
The protozoa are eukaryotic, unicellular animals whose cell lack cell wall. In addition, they posses the following characteristics:
They live as either free living or parasite in nature. As such, they feed heterotrophically.They are mostly motile through the use of organs like cilia. pseudopodia or flagella.Their size ranges from one micron to several millimeters.They mostly reproduce by binary fission.Answer:
The correct answer is "eukaryotic, unicellular, lack a cell wall".
Explanation:
Three characteristics that all organisms called protozoa posses is that they all are eukaryotic, unicellular and they lack of a cell wall. Actually the therm "protozoa" is an informal name given to any single-celled eukaryotic organism, which could be either a parasite or could be a free living organism. All protozoa lack a cell wall, which helps them to infect and live from other organisms in the case of the parasitic protozoa.
Which of the following is not true of homologous recombination? Only occurs between regions of DNA sharing >50 basepairs of nearly identical sequence. Can repair a collapsed replication fork. Always accompanied by some loss of DNA sequence. Responsible for crossing over at meiosis. Can repair a double-stranded break in chromosomal DNA.
Explanation:
Always accompanied by some loss of DNA sequence is not true of homologous recombination
Homologous recombination is a type of genetic recombination which requires homology between two DNA moleculesSingle stranded break occurs in same position of both DNA, after that strand invasion occurs Each invading strand joins to the broken end of other DNA molecule, creating a Holliday junctionHolliday junction predicts cross over or non cross over recombinant DNA, depends on whether cleavage is on vertical or horizontal planeCleavage in vertical plane produces cross over recombinant consisting of two heteroduplex DNAAfter the Aswan High Dam was built on the Nile River, the rate of parasitic blood-flukeinfection doubled in the human population near the dam. As a result of building the dam, the flow of the Nile changed. This changed the habitat, which resulted in an increase in its population of a certain aquatic snail. The snails, which were infected, released larvae of the fluke. These larvae then infected humans. This situation best illustrates that:
a.the influence of humans on a natural system is always negative in the long termb.the influence of humans on a natural system can have unpredictable negative impactsc.human alteration of an ecosystem does not need to be studied to avoid ecological disasterd.human alteration of an ecosystem will cause pollution and loss of finite resources
Answer:
b.the influence of humans on a natural system can have unpredictable negative impacts
Explanation:
The situation described best illustrated the fact that the disturbance of natural ecosystem by humans can have unpredictable negative impacts.
Option c is incorrect because human alteration of the ecosystem needs to be continuously studied to avoid ecological disasters.
Option d is incorrect because alteration of the ecosystem does not always end up in the pollution of the ecosystem and loss of finite resources.
While human alteration of the natural ecosystem often have long term negative impacts, many of these impacts can not be predicted until they happen. This makes option b to be more complete than option a.
The correct option is b.
The doubling of parasitic blood-fluke infections after the Aswan High Dam's construction illustrates that human impacts on natural systems can have unpredictable negative effects, altering habitats and increasing disease risks.
Explanation:After the Aswan High Dam was built on the Nile River, the rate of parasitic blood-fluke infection doubled in the human population near the dam. This increase in infection rates illustrates that the influence of humans on a natural system can have unpredictable negative impacts. Construction of the dam altered the river's flow, creating a new habitat that favored the proliferation of a particular aquatic snail species that harbored the parasitic fluke larvae. These larvae infected humans, showing that human alteration of an ecosystem has complex repercussions, affecting both the ecological balance and human health.
Dams impact the natural water habitat by altering temperatures, chemistry, flow characteristics, and silt loads. This can lead to extensive changes in the ecology, affecting a wide variety of species. Damming rivers, a common practice for human needs, can reduce or eliminate populations that rely on seasonal flow changes, such as certain fish and amphibian species. The case of the Aswan High Dam serves as an example of the unintended ecosystem and health implications of significant infrastructural projects.
n the United States and Canada, bats use one of two strategies to survive winter: They either migrate south, or they hibernate. Recently, those that hibernate seem to have come under attack by a fungus, Geomyces destructans (Gd), an attack that is occurring from Missouri to southern Canada. Many infected bats have a delicate, white filamentous mat on their muzzles, which is referred to as white-nose syndrome (WNS). The fungus invades the bat tissues, causes discomfort, and awakens the bat from its hibernation. The bat fidgets and wastes calories, using up its stored fat. The bat then behaves abnormally, leaving its cave during daytime in winter to search for food. Their food, primarily insects, is scarce during the winter, and the bats ultimately starve to death. Since 2007, it is estimated that up to one million bats have perished from WNS.
The Gd mat on the fur of the bats should be expected to consist of _____.
Answer:
Hyphae
Explanation:
It is given that the bat affected by fungus, Geomyces destructans (Gd) consists of delicate, white filamentous mat on their muzzles which could be possibly the hyphae.
It is so because the hyphae is made of cells having tubular cell walls which more or less look like internal cross-walls having large pores to absorb nutrients from the surrounding environment (i.e bat’s body) and transport them to thallus. Hyphae are basically long thread like structures that spread throughout their food and release enzymes that break down the food
How can scientists measure the amount of carbon in soils?
Answer:
The most accurate standard laboratory test for soil carbon is dry combustion using an elemental analyser. These instruments heat a small sample (usually a fraction of a gram) of dry pulverized soil to around 900 degrees C and measure the carbon dioxide gas that is a combustion product
Explanation:
What implications need to be considered when creating environmental policies? Pick all that apply?
How much will it cost?
How will it affect the environment?
How will it affect people?
Is the benefit worth the cost?
How will it reduce tourist activity?
Answer:
How much is the cost?
How much it will affect the environment?
Is the benefit worth the cost?
How will it reduce tourist activity?
Explanation:
Environmental policies refer to our organizations or government commit themselves to the establishment and fulfilment of laws, regulations and other policies mechanism about an environmental issues.
Example include policies on regulation of toxic substances in the environment.
It is important to consider those implications before creating environmental policies because it will determine how effective and beneficial it will be to the environment and people. The cost must be considered if it is worth it, how beneficial will it be, how will it affect the people and environment with in a negative or positive way, will it affect tourist activity, all this need to be considered.
Answer:
Is the benefit worth the cost
Explanation:
I think is this one
A postsurgical client reports calf pain combined with the emergence of swelling and redness in the area, which have culminated in a diagnosis of deep vein thrombosis. What treatment options will be of greatest benefit to this client?
Which did Kepler notice about planetary motion that caused him to propose Kepler’s first law of orbital motion?
The motions of the planets in the solar system made Keppler propose the laws of planetary motion.
Explanation:
The motions of the planets in the solar system made Keppler propose the laws of planetary motion.In simple words, Kepler's first law can be defined as all planets moved around the sun in the elliptical orbit having the sun as one of the foci.Kepler’s first law means that planets move throughout the Sun in elliptical orbits. An ellipse is a shape that follows a levelled circle.Kepler noticed that the orbits of the planets were ellipses, leading to Kepler's first law of orbital motion.
Explanation:Kepler noticed that the orbits of the planets were not perfect circles, as previously believed, but were actually ellipses. This observation led him to propose Kepler's first law of orbital motion, which states that each planet moves around the Sun in an orbit that is an ellipse, with the Sun at one focus of the ellipse.
how would the second row of values in the plant experiment most likely compare to the second row of values in the original experiment
The second row of values in plant experiment most likely to have "high oxygen level and carbon dioxide level would be the same".
Explanation:
The procedure by which living things convert oxygen and glucose to water and carbon, accordingly yielding vitality is called photosynthesis. It does not require the nearness of daylight and is continually happening in living life forms. Cell breath occurs in the mitochondria of cells.
Through these procedures, plants get the carbon dioxide they need, and living life forms get the oxygen they need. They are additionally crucial to the vitality trade that living things need to endure.
Which statement about fluid pressure is true?
A. Areas of low pressure spin around regions of high pressure.
B. Areas of low pressure are warmer than areas of high pressure.
C. Fluids move from areas of low pressure to areas of high
pressure.
D. Fluids move from areas of high pressure to areas of low
pressure.
Answer:
it is b
Explanation:
Final answer:
Fluids move from areas of high pressure to areas of low pressure (Option D), which is a fundamental concept in fluid dynamics and impacts weather systems, gas behavior, and various scientific phenomena.
Explanation:
The correct statement about fluid pressure is that fluids move from areas of high pressure to areas of low pressure (option D). This principle is a fundamental aspect of fluid dynamics and is observed in various weather systems and the behavior of gases and liquids. For example, wind is an illustration of this principle as it generally blows from high-pressure zones, which are typically cooler, towards low-pressure zones, which are warmer due to the rising of less dense, heated air. Similarly, gas will move from an area of high pressure to an area of low pressure. This movement is driven by the desire to achieve equilibrium where the pressure differences are no longer present. Understanding this behavior is essential for comprehending weather patterns, ocean currents, and various engineering applications.
Why do cattle sex cells (egg and sperm cells) only have 30 chromosomes while the cattle's other cells have 60 chromosomes?
Answer:
Explanation:
becase it is the way it is the why the have alot of babe when th4e sperm in a girl
Cattle sex cells (egg and sperm cells) have only 30 chromosomes because they are haploid cells, meaning they contain a single set of chromosomes. This is in contrast to the other cells in cattle, which are diploid and contain two sets of chromosomes, making a total of 60 chromosomes. The process by which haploid cells are formed is called meiosis, and it ensures that when an egg and a sperm fuse during fertilization, the resulting zygote will have the correct diploid number of chromosomes.
In cattle, as in many other organisms, there are two types of cells in terms of chromosome number: somatic cells and gametes (sex cells).
1. Somatic Cells: These are the cells that make up the body of the organism, such as skin cells, muscle cells, and nerve cells. In cattle, each somatic cell contains 60 chromosomes, which is the diploid number for this species. These chromosomes are organized into pairs, with one member of each pair coming from the mother and the other from the father.
2. Gametes (Sex Cells): These are the reproductive cells, specifically eggs in females and sperm in males. Unlike somatic cells, gametes are haploid, meaning they contain only one set of chromosomes. In cattle, this means that each gamete has 30 chromosomes. The process of meiosis is responsible for reducing the chromosome number by half.
- Meiosis: This is a specialized type of cell division that occurs only in the production of gametes. It involves two rounds of division:
1. In the first round, homologous chromosomes (one from each parent) pair up and exchange genetic material (crossing over), followed by the separation of these homologous pairs into two cells. This results in cells that are still diploid but have only one chromosome from each original pair.
2. In the second round, the sister chromatids (copies of each chromosome) are separated, resulting in four haploid cells, each with only one set of chromosomes.
3. Fertilization: When an egg and a sperm fuse, their haploid sets of chromosomes come together to form a diploid zygote with the full complement of 60 chromosomes. This restores the diploid number and ensures that the offspring receives genetic information from both parents.
In summary, cattle sex cells have only 30 chromosomes because they are the product of meiosis, which reduces the chromosome number by half to ensure that upon fertilization, the offspring will have the correct number of chromosomes characteristic of the species.
One mechanism by which viruses may cause cancer is to interrupt the genetic regulatory sequences of repressor proteins. Which of the following types of viruses is most likely to be involved in causing cancer by this mechanism?A) +ssRNA virusesB) dsRNA virusesC) -ssRNA virusesD) retrovirusesE) +ssRNA and -ssRNA viruses
Answer: D) retroviruses
Explanation:
Retroviruses are a type of virus that converts its genetic material into DNA using a special enzyme, called reverse transcriptase. The DNA is then able to integrate into the DNA of the host cell. Once integrated, the virus can make additional viral particles using the components of the host cell.
Retroviruses which cause cancer at low incidence do not contain host information inserted. Rather, they tend to cause cancer via the expression mutation of potentially oncogenic host genes. Retroviruses incorporate proviral DNA into their host's chromosomal DNA during their natural life-cycle. Provirus DNA promoter affect regulatory gene expression over.
Hence, the correct option is D.
In prokaryotes new mutations accumulate quickly in populations, while in eukaryotes new mutations accumulate much more slowly.
The primary reasons for this are:_________.
A) Prokaryotes have short generation times and large population sizes.
B) Prokaryotes have random mutations while eukaryotes can target genes for mutations; thus mutations may not accumulate as quickly in eukaryotes but they are more useful to the organism.
C) The DNA in prokaryotes is not as stable as eukaryotic DNA and is thus more likely to mutate.
D) Prokaryote mutations are less effective than eukaryote mutations in providing variation for evolution.
Answer: Option A
Explanation:
In Prokaryotes the the rate of new mutations is much more as compared to the eukaryotes. The rate of accumulation of mutation is slow in case of eukaryote because their generation is long as compared to prokaryotes.
Prokaryotes have short generation time and large population size which enables them to accumulate the mutation quickly.
The machinery is also not that complex when it comes to prokaryotes. Transduction, conjugation and tranposable elements. So, the changes during these processes leads to mutation in the prokaryotes and can be observed quickly due to their small generation.
While observing primates at the zoo, you notice that the particular monkey you are watching uses its hands, feet, and tail to hold on to branches and move throughout its enclosure. What must be true of this monkey?
Answer:
The monkey is a new world monkey
Explanation:
The New world monkey is the monkeys which are evolved from the old world monkey-like apes and many other genera.
These monkeys have evolved from the old world Simian monkeys in South America about 40 million years ago and adapted to survive in the tropical areas of South America and the regions of Mexico.
This monkey can be characterized by their long-tails called prehensile tails, the use of their hands and feet to walk on the trees.
Since the characters of the monkeys provided in the question show similar characteristics to these, therefore, are considered the New World Monkeys.
Which stimulus most likely caused the leaves on these trees to turn from green to yellow?
A. too much water
B. change in soil
C. change in seasons
D. too much sunlight
Answer:
The change in the season
Explanation:
Temperature, light, and water supply have an influence on the degree and the duration of fall colors. Low temperatures above freezing will favor anticyclonic formation producing bright reds in maples. However, early frost will weaken the brilliant red color. Rainy and/or overcast days tend to increase the intensity of fall colors.
Diseases of animals that may be transmitted to humans are described as
Answer:
Zoonotic Diseases
Explanation:
Zoonotic Diseases: Disease Transmitted from Animals to Humans. A zoonosis (zoonotic disease or zoonoses -plural) is an infectious disease that is transmitted between species from animals to humans (or from humans to animals)
Example: Corona virus
Animals that commonly transit diseases : Rat, Bat
The size of a population refers to the _____
of individuals in the population.
Answer: cells
Explanation:
name some short-term changes
Answer:
environmental : fog , flooding , blizzards, and avalanches
Explanation:
Jeanie was playing croquet. The picture below shows her holding her wooden mallet. Jeanie swung her mallet hard and hit her ball. there was a loud "crack!" her ball moved away. what happened to the energy of Jeanie's mallet when her mallet struck the ball?
A. Some of the energy went into the ball, and the rest of it went into the ground.
B. All of the energy went into the air.
C. All of the energy went into the ball.
D. Some of the energy went into the ball, and some of it went into the air.
Answer:
D. Some of the energy went into the ball, and some of it went into the air.
Explanation:
When Jeanie's mallet hit the ball, some of its energy was transferred to the ball, since the ball moved. The loud noise means that some of the energy was changed into sound. Some of the energy stayed in the mallet, because the mallet did not stop moving when it hit the ball. So, some of the energy went into the ball, and some of it went into the air.
This is a two-part process that ends in the assembly of proteins at the ribosomes within cells. The first part
Answer:
The protein synthesis.
Explanation:
The question is not complete, here is the complete question:
This is a two-part process that ends in the assembly of proteins at the ribosomes within cells. The first part, transcription, begins in the nucleus, when the DNA code is transferred to mRNA. The second part, translation, takes place at the ribosomes, where both mRNA and tRNA work to assemble proteins.
The events in the question are describing protein synthesis.
I hope this answer helps.
Earle says, “No blue, no green.” Explain what she means by this.
Answer:
Without the ocean and other water sources, the blue, we can’t have the land, green. Earle compares a waterless Earth to Mars. Earth would be lifeless without the ocean.
*WARNING*
Do not copy this answer word for word, you'll be caught for plagarism!
Explanation:
No blue (water), no green (land and life).
Name four parts of the respiratory system in order that air comes into the body, and describe the role it plays in respiration.
Answer:The pharynx, larynx, trachea and bronchi are four parts of the respitaory system that air comes into the body. the role that they play in respiration is that they bring oxygen into our blood stream and then help push out carbon dioxide into the atmosphere
ezra fits aka Mr.fitz ( Pretty Little Liars)
The four parts of the respiratory system through which air enters the body are the nose, pharynx, larynx, and trachea.
Parts of the respiratory system?Nose: Air enters the body through the nostrils, where it is filtered, humidified, and warmed. Tiny hair-like structures called cilia trap particles, preventing them from entering the lungs.
Pharynx: The air then moves to the pharynx, a passage connecting the nasal cavity and the mouth. It serves as a common pathway for both air and food, directing air into the trachea and food into the esophagus.
Larynx: The larynx, also known as the voice box, contains the vocal cords. It prevents food and liquids from entering the trachea during swallowing and produces sound when air passes over the vocal cords.
Trachea: Air travels down the trachea, a tube reinforced with C-shaped cartilage rings that prevent collapse. The trachea branches into bronchi, leading to the lungs.
More on the respiratory system can be found here: https://brainly.com/question/4190530
#SPJ3
When dna from two sources is combined into one single piece of dna
Answer:
Recombinant DNA and genetic techniques. Recombinant DNA (or rDNA) is made by combining DNA from two or more sources. In practice, the process often involves combining the DNA of different organisms.
Explanation:
Answer:
It is known as recombinant DNA
Explanation:
Recombinant DNA involves the combination of DNA from two or more sources, often of different organisms
What is the overproduction of rabbits? PLEASE HELP ME!
Answer:
Overproduction of lipoproteins in rabbits is called Hereditary Hyperlipidemia.
Explanation:
It is metabolic disorder in New Zealand white rabbits, characterized by high cholesterol level. They are induced ovulators.
The genetic code is essentially the same for all organisms. From this, one can logically assume all of the following EXCEPT: A) DNA was the first genetic material. B) All organisms have a common ancestor. C) A gene from an organism could theoretically be expressed by any other organism. D) Related organisms have many similar genes. E) All organisms must either manufacture nucleotides or obtain them from their environment.
Answer: DNA was the first genetic material.
Explanation:
The genetic code is essentially the same in all the organism. This states that the similar organism can have similar genes in them that codes for the similar proteins hence, called as similar organism.
The genetic material is chemically made of nucleotide which is either being synthesized in the body or being obtained from the environment similar to that of amino acids.
If the genetic code is same one organism descend from the other organism.But these statement does not supports that DNA was the first genetic material to found in living beings.
Although the genetic code is nearly universal across all organisms hinting at a common ancestry, such a fact cannot logically validate the claim that DNA was the first genetic material. The origins of life's first genetic material remain a subject of scientific debate, and this cannot be inferred from the universality of today's genetic code.
Explanation:The genetic code is nearly universal, shared among all organisms to some degree. This homologous characteristic implies shared common ancestry and suggests that virtually all organisms use the same genetic code for protein synthesis, which allows for genes of one organism to theoretically be expressed by another organism. Traits and functions of specific DNA and RNA dictate many of the characteristics that different organisms possess, with minor variations occurring in the genetic systems of different domains of life.
However, statement (A), 'DNA was the first genetic material,' cannot be logically inferred from the fact of a universal genetic code. While DNA plays a crucial role in all known forms of life, it is still a matter of scientific debate to determine whether DNA, RNA, or some other form of genetic material first carried genetic information in early life forms, and this cannot be concluded simply from the universality of today's genetic code.
Learn more about Genetic Code here:https://brainly.com/question/17306054
#SPJ6
The picture shows a giraffe eating leaves.
Which describes the interaction?
O
abiotic interacting with abiotic
biotic interacting with biotic
abiotic interacting with biotic
biotic interacting with abiotic
O
Answer:
Biotic interacting with biotic is the answer.
Explanation:
Biotic=Alive such as plants,animal,and human.
Abiotic=Non-living
Answer:
Biotic interacting with biotic is the answer.
Explanation:
Just took the practice unit test and got it right
how ach changes the ion permeability of the sarcolemma?
The complete question is :
Which of the following best describes how ACh changes the ion permeability of the sarcolemma?
A) ACh activates acetylcholinesterase.
B) ACh entry into the axon terminal causes neurotransmitter release.
C) ACh binds to receptors in the junctional folds.
D) ACh entry into the muscle fiber causes Ca2+ to be released by the sarcoplasmic reticulum.
Answer:
C) ACh binds to receptors in the junctional folds.
Explanation:
Sarcolemma is the term used for the cell membrane of the skeleton muscle fiber cell.
At the motor end plate, there are several folds present in the sarcolemma that are known as junctional folds.
These junctional folds have several acetylcholine (Ach) receptors present on them and these are ion channels that are chemically gated.
These ion channels open upon binding of Ach and thus, the ions can diffuse into the sarcolemma.
Thus, the binding of Ach on the receptors located in the junctional folds increases the ion permeabiltity of the sarcolemma.
Answer:
C) ACh binds to receptors in the junctional folds.
Explanation:
ACh binds to receptors in the junctional folds. diffuses into the muscle fiber through open chemically gated ion channels. binds to ACh receptors, causing them to open chemically gated ion channels.
1.
Choose the best answer.
The Golgi apparatus is the _____ of the city.
post office
power plant
city hall
manufacturing plant
2.
Choose the best answer.
How does a negative feedback loop respond to a variable?
speeds up the process
changes the stimulus
stops the stimulus
makes no change
3.
Choose the best answer.
Which organelle is RNA contained in?
endoplasmic reticulum
ribosomes
nucleus
cell membrane
4.
Choose the best answer.
The heart is made of which type of tissue?
cardiac
muscular
skeletal
smooth
5.
Choose the best answer.
Homeostasis keeps the body _____.
balanced or stable
unbalanced
in a positive feedback loop
in a negative feedback loop
6.
Choose the best answer.
Which of the following processes is a positive feedback mechanism of the endocrine system?
glucose control
reflex
temperature control
clotting
7.
Choose the best answer.
What is the function of muscular tissue?
movement
secretion
protection
absorption
8.
Choose the best answer.
What is it called when areolar tissue collects water?
tissue collection
osmosis
inflammation
edema
9.
Choose the best answer.
The nucleus is the _____ of the city.
transportation
post office
manufacturing plant
city hall
10.
Choose the best answer.
The city limits represents which part of the cell?
cell membrane
lysosomes
cytoplasm
nucleus
11.
Choose the best answer.
Which level of organization is blood?
cell
organ
organ system
tissue
12.
Choose the best answer.
What happens during prophase?
the nucleus disappears
chromosomes move to the edges
cell life cycle
cells reproduce
13.
Choose the best answer.
What is the function of the mitochondria?
packaging proteins
energy
control mechanisms
reproduction
14.
Choose the best answer.
Contractions during labor are _____ feedback mechanism.
positive
mitotic
negative
meiotic
15.
Choose the best answer.
Simple epithelial tissue has _____ layer(s).
two
one
three
four
16.
Choose the best answer.
Which is NOT a classification of muscle tissue?
dense
cardiac
skeletal
smooth
17.
Choose the best answer.
How does a positive feedback loop respond to a variable?
changes the stimulus
makes no change
increases the stimulus
stops the stimulus
18.
Choose the best answer.
Lysosomes are responsible for _____.
waste removal
control mechanisms
reproduction
packaging proteins
19.
Choose the best answer.
An overgrowth of cells is called _____.
cytokinesis
meiosis
cancer
disease
20.
Choose the best answer.
What is the receptor’s role in the homeostatic control mechanisms?
determines the best response
sets the control point
sends the message to the variable
recognizes the variable
Answer: manufacturing plant
Explanation:
Answer:
1.post office
2.changes the stimulus
3.nucleus
4.muscular
5.balance or stable
6.reflex
7.movement
8.tissue collection
9.city hall
Mining has only short-term effects on the Earth. Please select the best answer from the choices provided T F
Answer:
False
Explanation:
The statement "Mining has only short-term effects on the Earth" is false.
What are the effects of c on earth?Depending on the type of mine and its location, mining has both immediate and long-term effects on the soil. There are some non-fuel materials that can be mined without causing environmental harm.
The consequences can include soil erosion, sinkholes, biodiversity loss, and contamination of surface, ground, and freshwater resources by chemicals released during mining operations.
But in order to get useful material out of metal minerals, chemical treatment is required. It is possible to manufacture toxins, and when these toxins seep into lakes and streams, they frequently destroy anything they come into contact with. The effects are permanent.
Therefore, the statement is false.
To learn more about mining, visit here:
https://brainly.com/question/2365629
#SPJ6
In the fluid mosaic model of membrane structure, Select one: a. the proteins exist in a bilayer formation. b. the phospholipids are tightly bound in place. c. the carbohydrates are found exclusively on the intracellular surface of the membrane. d. the phospholipids act as a barrier to the passage of polar substances between the ICF and ECF e. the phospholipids arrange themselves into the shape of a channel, in order to allow ions to transport across the membrane.
Answer:
D) The phospholipids act as a barrier to the passage of polar substances between the ICF and ECF
Explanation:
The plasma membrane is made up of four major kinds of molecules which include; proteins, carbohydrates, cholesterol and phospholipids.
Phospholipids are the main structure of plasma membranes. The structure of phospholipids help it serve as a barrier by playing a role in the regulation of the movement of polar molecules intracellular and extracellular fluid compartments and therefore, protect the cell.
The phospholipid structure can be described as having two ends of a head and a tail. The head end is hydrophilic or water-loving, and contains a phosphate group. The tail is hydrophobic and is made up of fatty acid chains.
Phospholipids are arranged in a bilayer with the hydrophilic head facing outwards into the ECF and ICF and the hydrophobic tail facing inwards.
Examples of phospholipids found in the plasma membrane are phosphatidylcholine and phosphatidylserine.