Anyone know I’m confused

Answer:

The placenta allows the exchange of materials, including wastes, between the mother's blood and her developing fetus. - The placenta protects the fetus from some infections.

Explanation:

Hope this helps

Answer:

a mutation

Explanation:

becaus ethere are diffrent traits wich would be a mutation im in middle school i learned this is 2 so trust me.

Answer:

variation

Explanation:

Any difference between individual organisms or groups of organisms of any species caused either by genetic difference or by the effect of environmental factors is called variation. Variation is observed in physical appearance, metabolism, behavior, learning and mental ability, and other visible characters of an individual.

Answer:

C. People at a football game.

Answer: The biochemistry is the scientific study of the chemical substances.

Explanation:

In biochemistry the chemical composition of the chemical substances and their involvement in the vital body processes in living organisms is studied. The function and structure of the chemical compounds and their associated biomolecules is studied thoroughly. The biochemistry is studied at the molecular and the atomic level. In biometry the structural dimensions of the biomolecules is studied. This way the biochemistry is linked with biometry.

The stomata of a desert cactus will close during the day.

STOMATA:

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Answer:

The answer with minuts hours and days.

Explanation:

Answer:

meiosis

Explanation:

meiosis is used to produce gametes for sexual reproduction

Answer:

Meiosis, and female and male

Explanation:

Sexual reproduction is a reproduction that requires a male and a female of the same species to contribute genetic material. Special cells called gametes are produced through meiosis, which halves the number of chromosomes in each resulting cell. These cells are called haploid gametes.

Answer:

I do believe this. If you take the amount of neurons in the average adult body and expand them to the size of a say a blueberry It would expand to be the approximately the size of the sun

Explanation:

The given statement is true. It is a surprising fact that helps a person to believe that his brain has the power to take him beyond expectations.

Therefore, the given statement is true. It is a surprising fact that helps a person to believe that his brain has the power to take him beyond expectations.

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Answer:

B.

Explanation: Hope this helps! ^^

Answer:

99%

Explanation:

at a salt solution concentration of 2%, plasmolysis first started to occur.  So the other 98% in the "solution" would have just been water. Since  water inside cells needs to be greater than the amount of water outside the cells, we can say that the amount of water inside the elodea cells was 99% so that it can allow hypertonic plasmolysis to occur.

good luck in honors bio>.<

Answer:

B. The heart beat and pulse rate may change, but are always equal.

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Answer:

B

Explanation:

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When a gas obeys Boyle's law, the temperature is held constant. The correct option is C.

Boyle's law is given by Charles Boyle. It is a gas law that states the pressure decrease with the increase in the volume and the temperature remain constant. In other words, the pressure exerted on gas is inversely proportional to the volume of the gas.

The law shows the relationship between pressure and volume, with the temperature remaining constant. There are three gas laws which are given by different scientists. These laws show the relationship between two variables and the third remains constant. These variables are temperature, volume, and pressure.

Thus, the correct option is C. temperature regarding the gas obeys Boyle's law, and it remains constant.

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Answer:

A

Explanation:

Answer:

Well, sometimes you use the process of elimination in some areas.

Explanation:

For example,

You don't have common sense in math class, but you can determine how to divide and multiply an equation. Sometimes you don't have to be "AP Smart", and you can still have all A's.

Or you could just research the answers :)

Answer: No I read it on briticanna.com

Explanation:

Answer: A less dense and rises

Explanation:

Convection is a type of heat transfer happens when there is a movement of fluid (liquid or gas) in which convection currents are produced due to the movement of hot fluid upwards and cold fluid downwards. This happens as the density of hot fluid decreases due to presence of less number of mmolecules per unit volume. As the hot liquid becomes less dense, it starts moving upwards.

Thus convection occurs because heated material becomes less dense and rises.

That means we lose around 50 million cells every day. This is a lot of skin cells to replace, making cell division in skin cells is so important. Other cells, like nerve and brain cells, divide much less often.

Answer:

you can learn many things from them

Explanation:

scientists are able to examine, that volcanoes remove much of the earth's trapped heat when volcanoes erupt. Volcanoes also make new islands and scientists love to observe their habitats and the animals that inhabit them

It is important that the cell membrane contains openings into the cell because different ions and molecules enter and exit the cell through pores (membrane channels) located in the membrane.

Answer:

18. J.

19. B 23 chromosomes

Answer:

23

Explanation:

answer 18 and 19 Please help I will mark brainliest

Answer:

D

Explanation:

Resource partitioning is an example of sharing resources or splitting them up. In this case, both the raccoons and foxes hunt and share their territories or split them up depending on the time of day.