Sunlight :)
hope this helped
DNA replication...
a. involves Polymerase
b. occurs at one site
c. requires a DNA molecule to start the process
d. needs several days' time to occur
Option A is correct.
a. involves Polymerase
Explanation:DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule.
DNA polymerase is an enzyme that synthesizes DNA molecules from deoxyribonucleotides, the building blocks of DNA. These enzymes are essential for DNA replication.
what is the purpose of ethical guidelines for handling of experimental subjects
The purpose of ethical guidelines for handling of experimental subjects is to ensure the safety and well-being of all living creatures in an experiment.
Ethical guidelines include issues such as human rights, animal welfare, safety compliance with the law, conflicts of interest, health standards..
Ethical guidelines are the norms for the acceptable and unacceptable behaviors of the researchers.
Answer: To ensure the safety and well-being of all living creatures in an experiment
Explanation:
Why does the earth have more gravitation pull than the moon
The difference in concentration on the two sides of a membrane is called what
When the concentration o molecules inside a cell is different form the concentration of molecules outside a cell, we can either call it hypertonic or a hypotonic solution, and the difference between the two concentrations is called a concentration gradient.
Hypertonic - name given to a solution that has a bigger concentration than the concentration in a cell.
Hypotonic - name give nto a solution that has a smaller concentration than the concentration in a cell.
Hope it helped,
BioTeacher101
The difference in concentration across a membrane is known as a concentration gradient, essential for substance transport in cells and creating electrochemical gradients for physiological functions.
The difference in concentration on the two sides of a membrane is called a concentration gradient. A concentration gradient exists whenever a membrane separates two different concentrations of molecules, leading to a natural phenomenon where molecules move from an area of high concentration to an area of low concentration to equalize the concentrations. This process is crucial in biological systems for transporting substances across cell membranes, influencing various physiological processes. Concentration gradients are also pivotal in creating an electrochemical gradient when there is a difference in the concentration of ions across a membrane, affecting both chemical concentration and electrical charge on the two sides of the membrane.
Which statement is an example of a scientific theory?
A.
Hummingbirds do not like the color white because they visit other colored flowers more often.
B.
All living organisms are composed of one or more cells, which came from pre-existing cells.
C.
The Earth is the third planet from the Sun and has one moon, which orbits the Earth.
D.
The amount that caffeine affects a person's heart rate differs based on the person's age.
The correct answer is option B, that is, all living organisms are composed of one or more cells, which came from pre-existing cells.
A scientific theory refers to a well-substantiated illustration of some characteristic of the natural world, on the basis of a number of facts, which have been repeatedly confirmed via the experiment and observation. Such fact-supported theories are not hypotheses, however, are reliable explanations of the real world.
During the late 1830s, the zoologist Schwann and the botanist Schleiden were examining tissues and postulated the unified cell theory. According to the unified cell theory, all the living things comprises of one or more cells, the cell is the fundamental unit of life, and the new cells originate from the pre-existing cells.
the right answer sense nobody can get it right is C (on the test) all living organisms are composed of pussss one or more cells duh.
The six icons shown here are part of a model for understanding global change. What does the set of icons represent in the model?
A. human inputs to the global energy budget
B. human causes of changes to global systems
C. human activities that are independent of global change
D. the effects on human society of changes to global systems
i think b cuz humans change the planet a lot
The set of icons in the model represent human inputs to the global energy budget.
Explanation:The set of icons in the model represent human inputs to the global energy budget. These icons show the various ways in which human activities impact the global energy balance. They represent the different sources of energy, such as fossil fuels and renewable energy, and how these sources are used and consumed by human society.
For example, one icon might represent the burning of fossil fuels for transportation, which releases greenhouse gases and contributes to climate change. Another icon might represent the use of renewable energy sources like solar or wind power, which can help reduce carbon emissions.
Overall, these icons illustrate how human actions can affect the global energy system and contribute to global change.
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Which processes are affected by freeze and thaw cycles? check all that apply
A) creep
B) deposition
C) landslide
D) slump
E) weathering
creep and slump but im not sure about the other options
Answer:
A. creep
D. slump
Freezing and thawing is rapid heating and cooling of the material due to change in weather conditions. Creep and slump are formed due to mass wasting or movement of particles down the slope. The slump is the downward movement of loose soil and rocks. The creep refers to movement of highly withered or loose material down the slope. Both slump and creep occurs due to the force of gravity. The materials in both creep and slump are displaced from their origin because of rapid heating and cooling or freezing and thawing.
if the markup is 20% and the selling price is $45.00, what is the initial price
[tex]\frac{45}{120}=\frac{x}{100}\\x=37.50[/tex]
Given data:
markup = 20 %
selling price = $45.00
Initial price = ?
Solution:
As we now Selling price = 100% initial cost + 20% of initial cost
$45.00 = 120%
120% = $45.00
1% = 45/120
= 0.375
100% initial cost = 0.375 * 100 = 37.5
Initial cost = 37.5
Sorry about the blurry picture but I need help
You can rule out D, I think it may be B because in the question it mentions functional levels and the rest seem to be unlikely
The source of water for the Great Lakes was _______, which played a major role in forming the lakes during Earth's recent geologic past.
A.
erupting volcanoes
B.
stormy oceans
C.
manmade canals
D.
melting glaciers
The answers is D. melting glaciers
If the ribosomes of a cell were destroyed, what effect would this most likely have on the cell?
The destruction of ribosomes in a cell would halt protein synthesis, leading to a severe reduction in cell functionality or cell death, as ribosomes are crucial for assembling proteins necessary for all cellular processes.
Explanation:If the ribosomes of a cell were destroyed, it would have a profound impact on the cell's ability to synthesize proteins. Ribosomes are essential cellular organelles that read the information encoded in messenger RNA (mRNA) to assemble amino acids into polypeptides chains, which then fold into functional proteins. These proteins are vital for virtually all cell functions, including metabolism, structural integrity, and signaling.
Without functional ribosomes, cells would not be able to produce these necessary proteins. For example, in liver cells, the lack of protein production could lead to diminished blood proteins, impacting immune system functionality and blood transport. Similarly, since the rough endoplasmic reticulum (RER) is studded with ribosomes, its function in protein processing and folding would also be compromised. The consequences would be dire, potentially causing cell death or significant loss of function, as protein synthesis is critical for cell survival and maintenance.
Moreover, in scenarios where mutations occur – such as in the 60S ribosomal subunit or in the nucleolus which is responsible for ribosomal assembly – the effects on protein translation can include stalling or producing defective proteins, which can be detrimental to the cell's health and functioning. Overall, the destruction of ribosomes would halt protein synthesis, leading to an accumulation of nonfunctional proteins and ultimately, cellular dysfunction or death.
What is desertification? How are nomads and drought related to this process
Answer:
The process of desertification refers to the degradation of land. In simple words, it means changing of a fertile land into an infertile one. It has become one of the major issue in today's world. It is mainly caused due to the lack of rainfall, climate change, deforestation, overgrazing. The consequences of desertification is the occurrence of drought.
Drought is one of the common type of disaster that can have serious impact on the lives of planets. Due to this, a large number of people have to shift their places in order to search for food and to live. These people who migrate from one place to another, having no fixed location are considered as the nomads.
So, in one way, it can be concluded that droughts are responsible for the loss of habitat and people have to migrate from one place to another like the nomadic people in order to survive.
The production of a single type of spore is a characteristic of the life cycles of
Mosses and most ferns.
Hope this helps!
why cant or shouldnt you use pet waste in compost
Using pet waste in compost presents several challenges and risks that make it generally not recommended for composting.
1. Pathogens: Pet waste can contain harmful pathogens such as bacteria, viruses, and parasites, including E. coli, Salmonella, and Toxoplasma gondii, which can survive in composting conditions and pose health risks to humans and animals if the compost is not properly managed or reaches maturity.
2. Parasites: Parasitic organisms like roundworms (such as Toxocara spp.) and hookworms (such as Ancylostoma spp.) commonly found in pet waste can persist in compost and potentially infect humans and animals upon exposure.
3. Odor: Pet waste has a strong and unpleasant odor, which can persist during composting and may attract pests like flies, rodents, and other scavengers.
4. Nutrient imbalance: Pet waste tends to be high in nitrogen and can imbalance the carbon-to-nitrogen ratio (C:N ratio) of compost, leading to slow decomposition and the production of ammonia and other volatile compounds, which can be harmful to plants and soil organisms.
5. Regulatory concerns: In some areas, using pet waste in compost may be regulated or prohibited due to concerns about public health and environmental contamination.
Instead of composting pet waste, it's recommended to dispose of it properly through methods like flushing it down the toilet (for cat litter that is specifically designed for flushing), burying it in a dedicated pet waste digester, or using specialized pet waste disposal systems. These methods help minimize the risks of contamination and ensure proper management of pet waste.
The complete question is;
Why cant or shouldnt you use pet waste in compost?
During the Carboniferous period, which occurred approximately 360 to 300 million years ago, most of Earth was covered in dense rainforests. These rainforests were sustained by a humid and tropical climate that lasted for most of the Carboniferous period. At the end of the period, Earth's climate became much colder and drier, leading to a wide-scale collapse of the rainforests and a significant loss of vegetation.
The statement is - True.
The Carboniferous period/epoch is a period that lasted approximately 60 million years, being between the Devonian, and Permian periods. It got its name because it is the period from which most of the coal originates on our planet. During the first half of this period, the planet was mostly covered in dense swampy forests, and the land life was developing very well. In the second half of it, because of the geologic activities that caused the continents to collide and form Pangaea, the climate changed, it became much colder and much drier, and lots of mountain ranges appeared, and this caused a large scale demise of the vast rainforests.
Answer:
Over millions of years, the decaying vegetation would have been buried and its carbon turned into fossil fuels.
Explanation:
Which human activity has the most negative effect on the stability of an ocean environment
Dumping waste from ships
Answer: Carbon emission
Explanation:
The human activity such as burning of fossil fuel and releasing of harmful gases in the atmosphere also affect the oceans.
The green house gas like carbon dioxide is harmful for the animals living inside water. This is so because the carbon dioxide in water becomes carbonic acid in low pH.
This does not allows the formation of calcium carbonate in the water which is the structural component of many aquatic animals.This hinders the formation of shells in molluscan.
Which statements accurately describe mass? Check all that apply. Mass is a chemical property of an object. Mass is measured using a balance. The mass of an object remains constant. Mass is the same as weight. Kilograms are units of mass.
Kilograms are units of mass
The mass of an object remains constant
Mass is measured using balance
These are the correct answers, I hope it helps
The statements that accurately describe mass are;
Kilograms are units of massThe mass of an object remains constantMass is measured using balanceWhat is mass?Mass serves as the quantity of matter in a physical body, mass can be measured through the body's inertia,
Therefore The mass of an object remains constant and Mass is measured using balance.
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LESSON 5: bio 1A Cells and homeostasis
#1 which of the following are factors that both unicellular and multicellular organisms actively balance in order to achieve homeosis?
A.) size, shape, and mass
B.) texture, density, and flexibility
C.) wastes, nutrients, and water (CORRECT)
D.) sound, light, and temperature
#2. what would be the outcome of a unicellular organisms that can not maintain homeostasis?
A.) it dies (CORRECT)
B.) it divides
C.) it shrinks
D.) it grows larger
#3 which of the following statements are true?
A.) both unicellular and multicellular organisms are at risk of having too much water entering their cells if they are exposed to water containing no salts (CORRECT)
B.) only multicellular organisms have structures that enable them to regulate excess water entering their cells
C.) unicellular organisms can protect themselves against too much water uptake by closing their membrane channels that allows water transport
D.) unicellular organisms, but not multicellular organism, must deal with the movement of water by osmosis across their cell membranes
#4. how are cells in a multicellular organisms able to achieve homeostasis?
A.). they are uniform in function at work independently from one another
B.). they are specialized in function and work independently from one another
C.). they are uniform in function and work cooperatively with one another
D.) they are specialized in function and work cooperatively with one another (CORRECT)
1.) C
2.) A
3.) A
4.) D
i got a 4/4 a %100
hope this helps :)
It is the replacement of a section or one part of an insect or a different segmented animal by a composition composed of a different section, primarily through mutation. In evolutionary developmental biology, homeosis is the transmutation of an individual organ into another, resulting from a mutation or mis expression of several developmentally important genes, especially homeotic genes.
Answer#2 (A) It dies
Unicellular organisms are the once which carries only one cell. Homeostasis is the state organism requires to operate at highest productivity. If an organism does not preserve homeostasis, the organism will not be capable to perform at full ability. Living things react to stimuli that happen inside them.
The amount of salt in the center of the living cells is greater and so the water will flow from the medium which has no salt to the interior of the cell where there is salt, this process is called as osmosis. And as a result to this salt content is higher in both the cellular organism.
Cells are categorized according to their function so that they can interact with one another and work together. Similarly, the once that does not possess same functions are kept apart so that living process does not pauses or stops.
select all that apply
select characteristics which taxonomists to might choose in constructing a plant classification.
A. leaf shape
B. Type of fruit
C. soil preference
D. cones or flowers
E. flower color
i think leaf shape and cones and flowers hope this helps.
What is the name for subatomic particle in an atom that has no charge
Neutrons
Explanation:A neutron is a subatomic particle found in the nucleus of every atom except that of simple hydrogen. The particle derives its name from the fact that it has no electrical charge; it is neutral. Neutrons are extremely dense.
Packaging center of a cell
The Vacuole is the packaging center in the cell.
Hope that helps :)
The 'golgi complex' basically functions as a packaging center for the cell.
What are two ways that diatoms differ from slime molds? Choose the correct answer from the drop-down menu.
The external coverings of diatoms are made up of [peptidoglycan, silica, or chitin], while slime molds have cell walls containing [silica, chitin, or peptidoglycan]. Diatoms are [chemoautotrophs, photoautotrophs, or chemoheterotrophs] because they make food through photosynthesis, while slime molds are [autotrophs, phototrophs, or heterotrophs].
Answer:
The external coverings of diatoms are made up silica , while slime molds have cell walls containing cellulose. Diatoms are photoautotrophs because they make food through photosynthesis, while slime molds are heterotrophs.
Explanation:
Diatoms can be described as algae that are mostly single-celled. They are made up of a unique kind of cell wall composed of silica. This cell wall is termed as a frustule. Mostly, diatoms are capable of carrying out photosynthesis and hence make their own food.
Slime moulds can be described as organisms that are fungus-like protists. They are not capable of producing their own food and feed on other plants. Hence, they are heterotrophs.
Diatoms' external coverings consist of silica and they are photoautotrophs due to their ability to perform photosynthesis, whereas slime molds have cell walls with chitin and are heterotrophs.
Explanation:Two ways in which diatoms differ from slime molds include the composition of their external coverings and their nutritional modes. The external coverings of diatoms are made up of silica, similar to glass or sand, and are known for their intricate, sculptured frustules. In contrast, slime molds typically have cell walls containing chitin or are wall-less when they are in their amoeba-like stage. Furthermore, diatoms are photoautotrophs because they perform photosynthesis to produce their food using sunlight, carbon dioxide, and water. Slime molds, on the other hand, are heterotrophs, obtaining their nutrients by consuming other organisms or organic matter. This fundamental difference reflects their distinct strategies for survival and reproduction within their respective ecosystems.
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what type of substances diffuse most readily through a cell membrane
where is carbon stored within the biosphere?
Carbon is stored on our planet in the following major sinks (Figure 9r-1 and Table 9r-1): (1) as organic molecules in living and dead organisms found in the biosphere; (2) as the gas carbon dioxide in the atmosphere; (3) as organic matter in soils; (4) in the lithosphere as fossil fuels and sedimentary rock deposits ...
Carbon is stored in the biosphere in the atmosphere, oceans, ocean sediments, soil, land sediments including fossil fuels, and the Earth's interior.
Explanation:In the biosphere, carbon is stored in various carbon reservoirs, which are critical components of the biogeochemical carbon cycle. Earth's atmosphere serves as a significant repository, with carbon dioxide being a major form of carbon here. The oceans are the largest carbon store, with vast amounts of carbon present in both the water and the ocean sediments.
Additionally, carbon is found in soil, where it is a part of organic matter and is processed by a multitude of soil organisms. Land sediments contain carbon in the form of fossil fuels, and Earth's interior also stores carbon, which can be released via volcanic activity. These reservoirs help regulate the global climate by acting as sources and sinks for carbon, which has implications for climate change and the greenhouse effect.
A fungus colonizes the meadow and kills most of its vegetation. What is most likely to happen to the populations of herbivores and carnivores in the ecosystem?
While most carnivores hunt and kill their prey, scavengers usually consume ... Herbivores, or organisms that consume plants and other autotrophs, are the second trophic level. ... They keep an ecosystem free of the bodies of dead animals.
Answer:
-The populations of herbivores and carnivores will decline because less chemical energy will be stored in the ecosystem.
Explanation:
Plato/Edmentum
Writing about How the Endocrine and Exocrine Systems Maintain Homeostasis
which of the following organism convert energy from the sun into chemical energy ?
As conditions change inside and outside the cell, the cell must adjust to maintain a stable internal environment. Which of the following is NOT an example of how cells maintain homeostasis?
A. The cell membrane regulates what enters and exits the cell.
B. The nucleus contains all the genetic information of the cell.
C. Lysosomes break down molecules to excrete from the cell.
D. A cell began to repair skin cells through the process of mitosis.
Among the options provided, the function of the nucleus containing the genetic information of the cell does not directly support homeostasis. Cellular activities like selective permeability of the cell membrane, waste breakdown by lysosomes, and cell repair through mitosis help maintain internal stability.
Explanation:Homeostasis in a cell refers to the maintenance of a stable internal environment within a cell regardless of changes in internal or external conditions. Answer choice B, 'The nucleus contains all the genetic information of the cell', does not provide an example of a cell maintaining homeostasis. While it's true the nucleus contains all the genetic information of a cell, this function does not directly aid in the adjustment of the cell to maintain homeostasis.
On the other hand, options A, C, and D all involve activities that help cells maintain internal stability despite changing conditions. The cell membrane controls the movement of substances in and out of the cell, lysosomes break down waste materials, and cells repair themselves through mitosis—all of which contribute to homeostasis.
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The organ in the body work together like members of a pit crew servicing a race car . What other analogies can you think of to illustrate organ system working together
Final answer:
Organ systems are like a sports team or an orchestra where each player or instrument, respectively, plays a specific role, but they all need to work together harmoniously for the success of the team or the creation of a symphony.
Explanation:
An organ system is a group of organs that work closely together to perform the functions needed for the body to function properly. One analogy to describe how organ systems work together is comparing them to a sports team. Every player or organ has a specific role, but they must work in concert to win a game or keep the body healthy. Another comparison is that of an orchestra, where different instruments or organs each play their own part, but collectively they create a symphony or maintain body health.
Examples of Organ Systems
The nervous system, which includes the brain, spinal cord, and nerves, coordinates the body's activities by receiving and sending information.
It is essential that these organ systems work together synergistically to ensure the organism's survival, much like how individual team members or musicians must collaborate to achieve their shared goal.
what kind of bond forms between oxygen and hydrogen in a single water molecule?
The bond that forms between oxygen and hydrogen in a single water molecule is a: Covalent bond
Therefore, option 1 is correct
- A covalent bond involves the sharing of electron pairs between atoms, resulting in the formation of a stable molecule.
- In a water molecule (H2O), each hydrogen atom shares its electron with the oxygen atom, forming two covalent bonds.
- These shared electrons create a stable arrangement, allowing the water molecule to maintain its structure and properties.
- Covalent bonds are formed through the sharing of electron pairs between atoms.
- In a water molecule (H2O), each hydrogen atom shares its single electron with the oxygen atom.
- Oxygen has six valence electrons and can share two pairs of electrons, allowing it to form two covalent bonds with the two hydrogen atoms.
- This sharing of electrons results in a stable arrangement where each hydrogen atom has a full outer shell (two electrons), and oxygen has a full outer shell (eight electrons).
- Covalent bonds are strong and hold the atoms together to form molecules like water.
The complete Question is given below:
The bond that forms between oxygen and hydrogen in a single water molecule is a:
1) Covalent bond
2) Ionic bond
3) Hydrogen bond
4) Polar bond