Which statement is a hypothesis that might be tested by observing a desert animal's
behavior for 24 hours?
A. A rattlesnake can warm its body by shivering.
OB. A hummingbird will live longer if it decides to sleep in a burrow.
O O O
C. A kangaroo rat's body temperature can vary with the time of day.
D. A fish will eat more food at night, when the temperature is lower.

Protists represent an important evolutionary step between single-celled organisms and multi-celled organisms.

Protists have similar DNA to the DNA of cyanobacteria. This similarity show the evolutionary relationship between cyanobacteria and algae in which cyanobacteria is a single celled organism whereas algae is multi-celled organism so from this discussion we can conclude that protists is an important evolutionary step between single celled organism and multi-celled organism.

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Answer: True

HIV infects a type of white blood cell in the body's immune system called a T-helper cell (also called a CD4 cell). These vital cells keep us healthy by fighting off infections and diseases. HIV cannot reproduce on its own. Instead, the virus attaches itself to a T-helper cell and fuses with it (joins together).

Explanation:

T-cells, the thymus cells, work in a similar way but destroy infected cells rather than manufacture antibodies. In HIV infection, the body mounts a very strong antibody response in the first few weeks that partially works, bringing the viral load down from millions to, on average, about 50,000 copies/ml.

Answer:

The answer is true...

Explanation:

HIV infects a type of white blood cell in the body’s immune system called a T-helper cell (also called a CD4 cell). These vital cells keep us healthy by fighting off infections and diseases.

HIV cannot reproduce on its own. Instead, the virus attaches itself to a T-helper cell and fuses with it (joins together). It then takes control of the cell’s DNA, makes copies of itself inside the cell, and finally releases more HIV into the blood. HIV will continue to multiply and spread throughout the body – a process called the HIV lifecycle.

In this way, HIV weakens the body’s natural defences and over time severely damages the immune system. How quickly the virus develops depends on a person’s general health, how quickly they are diagnosed and start antiretroviral treatment, and how consistently they take their treatment

Matthias Schleiden and Theodor Schwann made a significant contribution to science as they discovered a basic principle of biology, that all plants and animals are made of cells. So the correct option is option D.

Matthias Schleiden and Theodor Schwann made the contribution of discovering a fundamental principle in biology known as the cell theory. In the 1830s, they independently proposed that all plants and animals are composed of cells. Their work laid the foundation for our understanding of the structural and functional units of life. Together, the contributions of Schleiden and Schwann formed the basis of the cell theory, The correct option is option D.

Learn more about the cell theory here.

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Answer:

B: A whole set

Explanation:

The only cells in your body that don't are sex cells. ie. Eggs and Sperm

Explanation:

First of all the mitochondria is the power house of a cell. Then a chloroplast is one which contains chlorophyll in which photosynthesis takes place.

Plants make use of photosynthesis to synthesize nutrients from carbon dioxide and water. If the chloroplast is damaged that means the plant would wither but it may not likely die since the mitochondria is unharmed.

Answer:

Platinum Pebbles  

Explanation:

Answer:

C. Fossil evidence provides a complete record of the organisms that once lived and are ancestors to other organisms.

Fossil evidence provides a complete record of the organisms that once lived and are ancestors to other organisms. Thus, option C is correct.

Fossil evidence supports the hypothesis that evolution can occur at different rates in different clades. Fossil evidence supports the hypothesis that individual organisms and populations evolve to adapt to a changing environment. Fossil evidence provides information on the allele frequency in ancestral populations.

Fossil evidence provides a complete record of the organisms that once lived and are ancestors to other organisms. The diagram shows fossil layers in different locations. The different shading in the diagram indicates different types of rock.Fossil evidence provides information on the allele frequency in ancestral populations.

Therefore, Fossil evidence provides a complete record of the organisms that once lived and are ancestors to other organisms. Thus, option C is correct.

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Nitrogen is the most abundant element in our planet’s atmosphere. Approximately 78% of the atmosphere is made up of nitrogen gas (N2).

Plant uptake of nitrogen compounds

Once nitrogen is converted into compounds like ammonium and nitrate, these can be taken up from soils by plants and then the nitrogen can be used to form macromolecules like proteins and nucleic acids.

Nitrogen is a crucially important component for all life. It is an important part of many cells and processes such as amino acids, proteins and even our DNA. It is also needed to make chlorophyll in plants, which is used in photosynthesis to make their food.

As part of these life processes, nitrogen is transformed from one chemical form to another. The transformations that nitrogen undergoes as it moves between the atmosphere, the land and living things make up the nitrogen cycle.

Fixation

Nitrogen in its gaseous form (N2) can’t be used by most living things. It has to be converted or ‘fixed’ to a more usable form through a process called fixation. There are three ways nitrogen can be fixed to be useful for living things:

Answer:

When the chemical energy in food is transferred to cells in the body, the energy can be transformed into energy used by the body to do many things like run, ride a bike, do the dishes, pump the heart, and keep the body warm.

Two examples of what a living thing can do once it has converted the energy from food into usable forms of energy are growth, reproduction, and movement, and by using the energy, they survive in the ecosystem.

Energy from food can be obtained, and that energy is further used for many reasons, such as metabolism and movement, and a living organism can use it to power its muscles for movement such as running and swimming. Apart from that, the energy is used for growth and reproduction, which allow an organism to develop and produce offspring.

Hence, two examples of what a living thing can do once it has converted the energy from food into usable forms of energy are growth, reproduction, and movement, and by using the energy, they survive in the ecosystem.

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Answer:

C

Explanation:

On detecting less amount of water in blood the hypothalamus gives signals for releasing the anti-diuretic hormone which causes kidneys to remove lesser amount of water from the blood.

Answer:

this is a circulatory system

in this system the purification of blood is occurs between the lungs and heart

Explanation:

please make me brainlist answer

Answer:

Chromosomes form is DNA in during mitosis.

Explanation:

In the context of the cell cycle, mitosis is the part of the division process in which the DNA of the cell's nucleus is split into two equal sets of chromosomes.

During mitosis, DNA is in the form of chromosomes, which is option D, as the chromosomes are condensed and highly coiled structures made up of DNA and associated proteins called histones.

During mitosis, a cell divides into two daughter cells that are genetically identical to the parent cell. Chromosomes are critical to this process because they carry the genetic information necessary for the formation of the new cells, and before mitosis begins, the chromatin (a complex of DNA and proteins) in the nucleus of the cell condenses into visible chromosomes. This condensation process involves the compaction of chromatin into a more compact and organized structure.

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Answer:

yes

Explanation:

The Hardy-Weinberg equilibrium can be disturbed by a number of forces, including mutations, natural selection, nonrandom mating, genetic drift, and gene flow. ... Because all of these disruptive forces commonly occur in nature, the Hardy-Weinberg equilibrium rarely applies in reality.

Answer:

B) the grass

Explanation:

Because producers go through processes like chemosynthesis and photosynthesis and grass which is a plant goes through photosynthesis.

Answer:

Example:Dogs,Lions

Explanation:

A carnivore is an animal which fedd on meat.

Answer:

tigers, bears, and panthers

Explanation:

A carnivore is a consumer that consumes other animals. that means it is near, or at the top of the food chain. (pls give brainliest!)

Answer:

The correct answer is - Sustainable development.

Explanation:

Sustainable development is the process of using or utilizing the natural resources in the present in such an efficient way that there will be resources for future generations without compromising their needs.

It is essential in the current situation as people overexploiting the natural resources that it is quite possible there will very few resources will be left for future generations.

Answer:

UAU;CGC

THIS IS THE CORRECT ANSWER

Answer:

what don't you know how to do?

Answer:

.e creating a split between religious conservatives who denied evolution and accomodationists who supported it

Explanation:

The Darwinian theory of organic evolution proposed that all forms of life evolved from more primitive life by differential survival and reproduction (i.e., by natural selection). Moreover, creationism is the religious belief that humans were created by God, whereas accommodationists refer to the persons that endorse cooperation and concession to the viewpoint of the opposition. In this case, Darwinian theory challenged the traditional religious anthropocentric viewpoint on human origins (i.e., humans descended from ape-like creatures by natural selection).

Answer: Hi, there your answer is:

Valine, Leucine & Isoleucine

Alanine

Arginine

Glutamine

Lysine

Aspartic acid

Glutamic Acid

Proline

Cysteine

Threonine

Methionine

Histidine

Phenylalanine

Tyrosine

Tryptophan

Asparagine

Glycine

Serine

Explanation:

Answer:

may be the answer is B. reproduce successfully

Answer:

A troposphere

Explanation:

Humans live in the troposphere. It is the layer of the atmosphere closest to the Earth. If there is pollution in the layer that we live in, we are more directly affected.

Answer:

Turn off the faucet if you aren’t using it atm,

Not pollute the water with gasoline

Explanation:

These will help preserve earth water supply because then you aren’t wasting the water or making it undrinkable.

Answer:

Use Fertilizers Wisely.

Apply Pesticides Wisely.

Use Landscaping Practices that Prevent Erosion.

Wash Your Vehicle Wisely.

Dispose of Pet Waste.

Use and Dispose of Household Chemicals Safely.

Evaluate Existing Roads

What is chlorophyll?

Chlorophyll is a green pigment which helps plants in the process of photosynthesis.

- TheExtraterrestrial

Answer:

Cat

it contain centrioles which is present in animal cell