Answer:
1. They effect crop productivity
As weeds start to grow in the area where the crops were destined to grow, the production of the crops gets lowered.
2. They deplete the crops from nutrition
The weeds will compete with the crop plants for resources such as minerals from the soil.
3. They will deplete water resources
The weeds will compete with the crop plants for water.
4. Sun-light will be depleted
The weeds will complete with the crop plants for sun light.
5. The crop quality will be affected
As the crop plants will be in competition with the weeds, hence their quality will be affected.
6. They can reduce the biodiversity of crop plants.
Describe three machines that humans have designed and explain how the mechanical advantage is used.
Answer:
A pulley
They are simple, yet powerful devices that can make small forces move large objects. It is designed to support movement and redirect tension.
The Screw
The screw help to hold things together,
such as pieces of wood or metal. screws
provide more strength and holding
power. They also form a tight seal.
They can also be removed fairly easily. Examples of screws included the grooves on a jar or soda bottle lids, the end of light
bulbs, water faucets and hoses, bottle caps, gas tank ,work screw and ect.
The Lever
Like other machines, a lever makes work easier by changing the force applied to the machine the distance over which the force is applied.
Three machines that humans have designed are screw, the lever, scissor.
what are the advantages of human designed machines?
Screws are the man made machine which is used to secure materials by digging in and wedging into a material, used for the development and building in all industries; it is commonly made up of carbon or stainless steel.
It is used to connect metals to other metals, and other electrical connection application, are designed for strength and high duty. Other type of screw called Sheet metal screws used to connect metal/rubber and vinyl/rubber combinations.
The Levers are the most useful machines are applied to do some work with minimal effort, it amplifies an input force to provide a greater output force. There are various types of levers depending upon the position of the fulcrum, the force and the weight.
Scissor is the simple and most popular machine used to lift with low lifting capacity and can be utilized in cleaning and maintaining exteriors, cutting clothes, papers etc.
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(27 Points iF cORRECT
Which of the following is an example of a biotic factor in an environment?
Question 5 options:
bacteria
sunlight
water
soil
Answer:
Bacteria
Explanation:
Because it is a living thing that can affect other organisms
Answer: Bacteria
Explanation:
The biotic factor can be defined as the factor which is living. A bacterial cell is an example of the biotic factor which can live on its own.
A single bacterial cell can move, can reproduce, use energy to survive by living in the environment.
All the living components of the environment are defined as biotic factors. Though they live in environment with the interaction with the non living components of life.
Describe two scenarios where where respiration can occur
Answer:
Each living organism is comprised of a specific number and features of cells. As the different cells are comprised of a very unique form of characteristics,while the cells are then able to produce the optimum amount of energy for the living being to carry out the various cellular functions inside a more systematic order.
But, the mechanism to produce the required energy is carried in two different ways or procedures inside the living being body. The respiration is the process during which the optimum amount of energy is produced from the breaking of larger molecules or elements, along with the energy there are also some of the by-products which are produced in the process.However, there are two main ways for each organism to generate the required amount of energy in order to carry out the different cellular functions in a proper way. 1. The Aerobic form of respiration, in which the presence is more significant along with the rest of the required elements. Along, with which the whole process is dependent upon the presence of the element during the process of aerobic respiration in normal conditions.2. The Anaerobic form of respiration is the process in which the oxygen,O₂ holds no such importance and the process can be executed well with out the presence of the oxygen,O₂.As there are different procedures for each cells to have the maximum amount of energy,E and over come the different feats to perform the different functions inside the living organism.There are always a number of factors which holds greater amount or level of significance in carrying out the different steps of both the processes.Respiration occurs in animals' cells for energy production and in plants' mitochondria and roots for metabolic processes.
Respiration, the process by which organisms convert organic compounds into energy, occurs in various environments and organisms.
1. Cellular Respiration in Animals: In animals, cellular respiration occurs within the cells of tissues and organs. During cellular respiration, glucose and oxygen are oxidized in the mitochondria to produce energy in the form of ATP (adenosine triphosphate). This process releases carbon dioxide and water as byproducts. For example, in humans, cellular respiration takes place in every cell of the body to provide energy for essential physiological functions such as muscle contraction, nerve transmission, and metabolism.
2. Aerobic Respiration in Plants: In plants, aerobic respiration occurs in different parts of the plant, including leaves, stems, and roots. During aerobic respiration, plants utilize glucose and oxygen to generate ATP and provide energy for growth, development, and metabolic processes. This process occurs mainly in the mitochondria of plant cells. Additionally, plant roots undergo respiration, utilizing oxygen from the soil to break down organic compounds and release energy for nutrient uptake and root growth. Overall, respiration in plants supports their survival, growth, and reproduction by providing the necessary energy for cellular activities.
Complete Question :
Give two examples where anaerobic respiration takes place.
Based on the cladogram, if moths undergo complete metamorphosis, we would MOST LIKELY infer that
A) butterflies and flies do as well.
B) all the insects undergo complete metamorphosis.
C) no other insects undergo complete metamorphosis.
D) only butterflies also undergo complete metamorphosis
Answer:
The correct answer is A) "butterflies and flies do as well".
Explanation:
Cladograms are graphic representations of the evolutionary relationships of species, where the branches and the closeness of the species represent the degree of similarity. In this case, the "butterflies, moths" and the "flies" are the ones closest to each other. Therefore, these species are the most similar and if moths under complete metamorphosis, we would most likely infer that butterflies and flies do as well. I attached the missing cladogram.
Question 25 of 33
1 Point
What can people do to conserve Earth's coal supply?
O
A. Install scrubbers in power plants.
O
B. Replant diminishing forests.
O
C. Invest in solar power plants.
O
D. Capture and store carbon.
SUBMIT
To conserve Earth's coal supply, the most effective method is to invest in solar power plants, as it reduces reliance on coal and promotes the use of clean, renewable energy.
Explanation:To conserve Earth's coal supply, people can invest in solar power plants which is option C. This investment would reduce dependence on coal as an energy source by utilizing renewable energy that does not deplete natural resources or contribute to carbon dioxide emissions. Options A and D (installing scrubbers in power plants and capturing and storing carbon) help to reduce the environmental impact of coal use rather than conserving the supply itself. Replanting diminishing forests (option B) is beneficial for the environment but does not directly affect coal supply conservation.
Additionally, adopting clean coal technologies can help mitigate the impact of coal usage by reducing air pollution and greenhouse gases. However, to truly conserve the coal supply, shifting towards alternative and renewable energy sources such as hydropower and geothermal energy is essential. This approach not only conserves coal but also promotes environmental sustainability and reduces greenhouse gas emissions.
This part of the cell stores wastes, water or food.
In cells, the vacuole is the organelle in which different substances or solutions are stored, this includes wastes, water, food, and even solids that the cell does not require because they are waste and therefore might contaminate the cell or substances the cell store to be used later.
Answer: vacuole
Explanation:
During the time of normal cell activity, DNA exists in a loose, spaghetti-like form called __________.
a. centromere
b. chromosomes
c. histone
d. chromatin
Answer:
D
Explanation:
Answer:
d. chromatin
Explanation:
Chromatin is a complex of DNA, RNA, and proteins that is present in the eukaryotic cell nucleus in the form of a long, spaghetti-like filament. Histones are the main proteins that make up the chromatins.
Chromatin is usually divided into two categories according to their condition: eucromatin and heterochromatin.
Eucromatin: When the chromatin filaments are less condensed it means that it has active DNA, ie the cell is able to "read" the content of this genetic material. Heterochromatin: The filaments are condensed, coiled together in a tangle. In this case, the DNA is inactive because cells at that time are unable to encode the condensed genetic material.
Which of these is an important function of salt marshes, such as the one on
the Cape Hatteras National Seashore in North Carolina?
Answer:
To provide food for migratory birds.
Explanation:
Answer:
Letter C is the correct answer.
Explanation:
Salt marshes are is a coastal ecosystem located in the upper coastal intertidal zone, between land and brackish water usually flooded by the tides. Salt marshes have an important role since they deliver food to different groups of animals.
HELP!!! We are going to ask the question: How does moving the fulcrum point effect the distance a nickel can fly?
Balance the ruler so there is an equal length on both sides of the fulcrum (at the 6” mark).
Put a nickel at the one inch mark on the ruler. Record your observations in the data table.
Keep the nickel at the 1” mark. Drop a quarter on the end of the opposite end of the ruler from about 12 inches in height. Measure the distance from the end of the ruler to where the nickel lands. Record your results.
Repeat this 3 times.
Now move your fulcrum to the 9 inch mark and repeat steps 2-4.
Now more your fulcrum to the 12 inch mark and repeat steps 2-4. Which causes the nickel to fly farther? Which takes more force?
Answer:
more force needed would be fulcrum at 12 with nickle at 1 the one closest to the nickle would go the furthest
So, honestly, to figure out this experiment, it is better to use a tube or round pen instead of the triangular block (because it is easier to find and easier to balance)
Now then, you simply gotta do is place the nickel right at the 1" point on the ruler for each trial and you will drop the quarter from 12" for each trial.
After wasting a few hours getting the ruler to not rotate while I launched the coins, I got a few sample results (this was calculated from the start position of the nickel)
______________________________________
Middle Trials (6")
T1: moved right about 0.5"
T2: moved left 1" and backwards 0.5" (-0.5")
T3: moved right 2" and backwards 0.5" (-0.5")
______________________________________
9" trials
T1: Right about 1"
T2: Right 0.5"
T3: around 0.8" foward
______________________________________
12" trials were all at 0" in change
______________________________________
The 12" trial requires more force for movement while the 9" trial gave the most positive changes forwards
Which kind of wave would be observed in outer space between planets, where there is very little matter?
O an electromagnetic wave, such as an X-ray
O an electromagnetic wave, such as a sound wave
a mechanical wave, such as an X-ray
O a mechanical wave, such as a sound wave
Answer:
A.) an electromagnetic wave, such as an X-ray
Answer:
I would say the answer is A)
Which of the following will NOT filter from the blood into the capsular space of the
renal corpuscle in a healthy nephron?
O Vitamins
o Water
O Amino acids
O Red blood cell
Urea
Answer:
amino acids is the answer
one a feature of the structure of all DNA Molecules is the
Answer:
The structure of the DNA is ideal for the complex function that it plays.
Some of the features of the structure of all DNA molecules are:
Sugar- phosphate backbone:
The sugar- phosphate backbone is ideal for providing the DNA a ladder- like shape which is essential for its functions.
Hydrogen bonds:
The hydrogen bonds present in the nucleotides keep both the DNA strands intact. If the hydrogen bonds were not present then the double helix would not have been able to form.
Coiling:
The structure of the DNA is coiled and super coiled so that it can fit into an organism.
what part of the hand is unique to primates and humans
Answer:
Opposable thumbs!
Explanation:
Humans and primates are the only species that can touch their thumb to their other four fingers.
Answer:
The Thumb
Explanation:
The Thumb is the most important part on the hand. you cant really do much without your thumbs.
Does Hyman's team have the ability to do this same procedure with other unidentified soldiers and if so, what would they need to move forward?
Answer: Yes, they would either need a blood relative to take DNA samples from or something the deceased had before their death such as a baby tooth or hair.
Answer:
Yes, they would either need a blood relative to take DNA samples from or something the deceased had before their death such as a baby tooth or hair.
Explanation:
A bat's wing and a moth's wing are ________ structures
a homologous b. analogous c. vestigial d. adaptive
Answer:
A
Explanation:
who is cuche girl...........
Answer:
uhhhh..
Explanation:
A line graph has a vertical axis labeled "Average plant mass (g)^ * and a horizontal axis labeled "Herbicide (g/plant)." What information is conveyed by a point plotted with the coordinates (3, 10) ? Keep in mind coordinates are written as (x-coordinate , y-coordinate).
A. The range average plant mass was from 3 g to 10 g.
B. The average mass of plants exposed to 10 g of herbicide was 3 g.
C. The range of herbicide was from 3 g per plant to 10 g per plant.
D. The average mass of plants exposed to 3 g of herbicide was 10g
Answer:
The correct option is D. The average mass of plants exposed to 3 g of herbicide was 10g.
Explanation:
As the vertical axis is labelled as average plant mass, it will make the y- coordinate.
As the horizontal axis is labelled as Herbicide (g/plant), it will make the x-axis.
The coordinates for the given value are (3,10). 3 will be the value of the x- coordinate. Hence, it will show the average mass of the plant at the plotted point which will be 3 g.
10 will show the value of the y- coordinate which will be the amount of herbicide given to the plant.
Hence, Dis the correct option.
The information is conveyed by a point plotted with the coordinates (3, 10) is The average mass of plants exposed to 10 g of herbicide was 3 g.
The correct answer is: B.
The coordinates (3, 10) on the graph correspond to the point where the x-coordinate (horizontal axis) represents the amount of herbicide (3 g per plant), and the y-coordinate (vertical axis) represents the average plant mass (10 g).
This means that the data point (3, 10) indicates that when plants were exposed to 3 g of herbicide per plant, the average mass of those plants was 10 g.Therefore, the correct interpretation is that the average mass of plants exposed to 10 g of herbicide was 3 g, which aligns with option b.
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Which statement best describes how waves carry energy?
A wave transfers energy by causing the particles of a medium to be set into vibration.
What is a wave?A wave is a disturbance along a medium which transfers energy. We know that the particles that compose a medium tend to vibrate when a wave is in motion.
Hence, a wave transfers energy by causing the particles of a medium to be set into vibration.
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How are 2 and 3 the answer
Answer No 2:
The correct option is C.
Translation can be described as a process by which proteins are produced from mRNA. This is because ribosomes are the sites where the production of proteins takes place. The mRNA which is formed as a product of transcription is translated in ribosomes to form a specific protein. As the disease, dyskeratosis congenita, causes mutations in the ribosomes hence, the production of proteins is the process which will be disturbed due to it. Hence, option C is correct.
Certain environmental changes can denature proteins. Denatured proteins lose their three dimensional structure and when the protein is an enzyme, they lose their ability to function. pH is just one factor that can change the effectiveness of an enzyme. What other factor might the students test regarding catalase specificity?
A) Students could test various other enzymes to see if all enzymes were denatured in a basic environment (pH = 13).
B) After determining the optimum pH, they could vary the temperature of the environment to see if catalase is temperature specific.
C) After determining the optimum pH, the students could vary the amount of catalase used while keeping the amount of substrate constant.
D) Students could test an assortment of food items besides liver, raw potato, apple, crackers, to see if catalase is consistently pH specific.
B) After determining the optimum pH, they could vary the temperature of the environment to see if catalase is temperature specific
Enzymes are proteins which catalyze reactions by acting on substrates in order to speed up reactions- like the breakdown of large polysaccharides by amylase. Here, the enzyme catalase facilitates the breakdown of hydrogen peroxide into oxygen and hydrogen. Catalase specificity is affected by pH, temperature and the presence of inhibitors.
In temperatures beyond its optimal range, catalase may undergo changes to its physical structure called denaturation; when denatured, enzymes lose their ability to bind specifically to their substrate -i.e. substrate binding specificity is lost. H2O2 would no longer be able to bind to the active site, and thus would not be broken down.
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Answer:
B
Explination:
After determining the optimum pH, they could vary the temperature of the environment to see if catalase is temperature specific. Proteins can be denatured through exposure to heat, changes in pH, or chemicals. Students could vary the temperature of the liver, even boil it, to see if enzyme action continued.
How do these
similarities support the
Theory of Evolution?
Answer:Homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations (beneficial features).
Final answer:
The theory of evolution is corroborated by a wide array of scientific evidence, including embryological similarities suggesting common ancestry, the existence of vestigial structures, and molecular consistency across species. The combined insights from Darwin, Wallace, and modern genetics continue to strengthen our understanding of evolution.
Explanation:
The theory of evolution is strongly supported by evidence from various scientific fields, including embryology, comparative anatomy, and molecular biology. Embryology, for instance, provides evidence through the similarities in the embryonic stages of different species, implying a common ancestry. Likewise, the presence of vestigial structures in organisms suggests evolution by natural selection, where these structures have lost their original function over time. Moreover, the molecular consistency across diverse species in terms of DNA and protein structures signifies that all forms of life share a common origin.
Molecular similarities among different organisms, such as the genetic code used in DNA to produce proteins, are remarkably consistent and point to a single, early origin for these mechanisms. This is further supported by the fact that the molecular machinery necessary to read and translate DNA into proteins has remained largely unchanged across all forms of life, a fact that is highly suggestive of a common past.
Furthermore, the study of biogeography sheds light on how the distribution and evolution of plants and animals are influenced by geological and climatic changes, reinforcing the principles of natural selection. The observation that species which evolved prior to the breakup of supercontinents have a worldwide distribution, while those that arose later are more localized, aligns well with evolutionary theory.
The integration of Charles Darwin's and Alfred Russel Wallace's insights on evolution with modern genetic discoveries like those of Gregor Mendel supports a cohesive understanding of life's diversity and interconnectedness. The complementary nature of these studies provides a robust framework explaining not only the visible similarities and homologies between organisms but also the more subtle genetic markers which betray a shared lineage.
Some scientists claim that humans are responsible for the increase of CO2 in the atmosphere. Evaluate which system the increased CO2 levels are likely to affect, and predict the effects of increasing atmospheric CO2 on natural and agricultural ecosystems.
Answer:
Smoke and fumes
Explanation:
Smoke and fumes contain carbon monoxide, carbon dioxide and carbon particles. These are produced from industries which burn coal and petroleum fuels and also from motor vehicles exhaust. Carbon dioxide prevents layers of warm air from escaping into the upper atmosphere causing greenhouse effect that leads to global warming. On a global scale, this may bring about melting of the polar ice caps thus raising the level of oceans hence flooding of lowland areas.
An individual’s behavior characteristics, emotional expression, and intensity that is established from birth is known as __________.
A. Attachment
B. Temperament
C. Security
D. Contact comfort
An individual’s behavior characteristics, emotional expression, and intensity that is established from birth is known as temperament.
Answer:
Temperament-Edge 2020
Explanation:
Before Daniel performed his experiment, he hypothesized, "If I raise the temperature of a cup of water, then it will be able to dissolve more sugar."
Which of the following results would support the hypothesis?
A.
The cup with the warmest water dissolved the largest amount of sugar.
B.
The cup with the coolest water dissolved the largest amount of sugar.
C.
None of these statements support the hypothesis.
D.
The cup with the warmest water dissolved the least amount of sugar.
Final answer:
The correct result to support the hypothesis that increasing temperature allows more sugar to dissolve is A. The cup with the warmest water dissolved the largest amount of sugar.
Explanation:
To support Daniel's hypothesis that increasing the temperature of water will allow it to dissolve more sugar, we need to find a result that shows a direct relationship between water temperature and the amount of sugar dissolved. Specifically, Daniel hypothesized that higher temperatures would lead to greater solubility of sugar in water. With this in mind, the correct result that would support his hypothesis would be: A. The cup with the warmest water dissolved the largest amount of sugar. This is because solubility often does increase with temperature. To further illustrate, when you dissolve sugar in hot water, it tends to dissolve more rapidly than in cold water due to the increased kinetic energy of the molecules resulting in more effective collisions between the sugar molecules and the water, thereby aiding in the dissolving process.
It is also relevant to note that solubility curves typically illustrate this relationship between solubility and temperature, indicating how different substances dissolve at varying rates depending on the temperature. In addition, while agitation of the solution can affect the rate of dissolution, it does not affect the maximum amount of solute that can be dissolved, which is determined by temperature and the nature of the substances involved.
Drought and water shortage: what’s at stake? What can we do?
Answer:
with a drought lots of crops can die of no water source this causes the economy to loose money from this therefore the economy suffers aswell with water shortage it takes away for the crops and from things with animals
Nutrients in the deep ocean come from dead marine organisms.
True
False
Answer:
True
Explanation:
The deep parts of an ocean receive minimal or no sunlight. Hence, the survival of phototropic organisms like plants and algae is impossible or minimal here. Hence, there is a very little diversity in deep oceans. The organisms living here have to feed on dead decaying matter or on each other for survival. Mostly, the organisms living here use dead organisms as food. No other food source is available here.
- What is the function of ATP in living things?*
a. ATP helps in protein folding
b. DNA is stored in the ATP
C. ATP is used to capture, store and transfer energy
d. ATP helps maintain the structure of the cell membrane
Answer:
C - Capturing, storing, and transferring energy.
Explanation:
ATP is used by cells to store and transport chemical energy. The cells then use this energy to drive cellular functions.
An uncircumcised, 78 year-old male has presented at the clinic complaining that he cannot retract his foreskin over his glans. On examination it is noted that the foreskin is very constricted. What is this condition called?
Answer:
Phimosis.
Explanation:
Phimosis may be defined as the medical condition in which the foreskin around the tips of penis cannot be retracted. This might occur due to scarring and can occur naturally.
The main symptoms of this disease is unable to retract the skin. The skin gets loose with time. The 78 year old man complains that his foreskin over the glans cannot be retracted over the glans. This symptoms is more or less related with the phimosis.
Thus, the correct answer is phimosis.
Answer:
phimosis
Explanation:
Which of the following monomers would be used to make the double helix of a DNA molecule?
DNA is the genetic material of a cell. It is known as deoxyribonucleic acid. It is made up of phosphate moiety, a deoxyribose sugar, and a nitrogenous base. Thus, the correct option is A.
What is DNA?DNA stands for Deoxyribonucleic acid. It is the genetic material of the cell. The DNA is made up of nucleotides, which is the monomeric unit of DNA. The nucleotides are composed of a deoxyribose sugar (5-membered sugar), a nitrogenous base (purine or pyrimidine), and a phosphate moiety.
The nucleotides polymerize to form DNA molecules, the DNA molecules wraps around the histone proteins (basic proteins) present in the nucleus to form nucleosomes in the nucleus which contains all the hereditary information of an organism.
Therefore, the correct option is A.
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why is there less energy in the top of the energy pyramid than there is in the bottom of the energy pyramid?
Answer:
Because at each trophic level energy is wasted or released into the environment.
Explanation:
Energy transfer from one organism to another is not complete transfer.Some energy goes into the environment in some other form.