BIOLOGY MIDDLE SCHOOL

Predator-prey relationships DECREASECompetition DECREASE
Toxins BOTH
New habitat BOTH
Disasters DECREASE
Increased food source INCREASE

Answers

Answer 1
Answer: This is correct to me
Answer 2
Answer:

Answer:

thx

Explanation:

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How the repertory system with following physiological requirements

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For Example:
Place your hand on your ribs and inhale deeply. You’ll notice that your chest expands and your back straightens. As this occurs, air is rushing through your windpipe and branches off to either your left or right lung. After 20 to 30 more branch , branch points, oxygen in the air ends up in the alveoli where it diffuses into the liquid that only surrounds the alveoli, and slips into the blood. This microscopic gas exchange occurs rapidly, oxygen is taken into the body and carbon dioxide is totally removed from the body, and then you exhale. 
Hope that this helps you! =)

What organelle do frog RBCs have that human RBCs do not and explain why?

Answers

Final answer:

Frog red blood cells have a nucleus that human red blood cells don't. This is because human RBCs eject their nucleus to allow more room for oxygen-carrying hemoglobin, while frog RBCs retain their nucleus potentially for environmental adaptability.

Explanation:

The organelle that frog red blood cells (RBCs) have, which human RBCs do not, is the nucleus. In mammals like humans, the nucleus is ejected from the RBCs as they mature to allow more space for hemoglobin, the protein that carries oxygen.

This makes human RBCs more efficient at oxygen transport. However, many amphibians like frogs retain the nucleus in their RBCs throughout their lifespan. The exact reason why frogs retain their nuclei is not entirely known. However, it might give the cells greater flexibility in responding to changes in the frog's environment.

Learn more about Nucleus in Frog RBCs here:

brainly.com/question/37245444

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Answer:

A nucleus

Explanation:

Organic compounds do NOT contain which of the following?

Answers

Okay... glad you got it but it is good to share in case someone else needs that answer :)
In the 19th century is was assumed that organic compounds could only be produced by plants and animals. These compounds all had carbon and hydrogen in common. Some organic compounds also include O, N, the halogens, S and a few other elements.

Now we know that organic compounds can be synthesized in the laboratory. Simple compounds of carbon and hydrogen include the alkanes and alkenes, for instance, as well as aromatics like benzene. But oxygen is a common element in organic compounds like alcohols, aldehydes, ketones and ethers.

So the bottom line is that all organic compounds contain C and H and some contain O as well, but O is not required to be an organic compound.

========= Follow up ==========

Why are these people saying "yes". It's obvious that there are many organic compounds that don't contain oxygen

What is genetic code?

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The genetic code is the set of rules by which information encoded within genetic material (DNA or mRNA sequences) is translated into protines  by living cells

Answer: it is D

Explanation:

Asked on this passage, which values seem to be most important to the Maori a. Freedom and individuality b. Togetherness and love c. Killing and war and d. Sacrifice and unhappiness

Answers

a.  freedom and individuality my cousin had the same question and she told me what it was.

Why are the cells produced by meiosis considered gametes?Can someone answer today it would mean a lot.

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gametes are cells used to sexual reproduction. they are haploids and that means they have just one set of chromosomes (most of the cells of our body have 2 sets). that kind of cells is produced mainly by meiotic division of the gamete's stem cell (called oogonium or spermatogonium) and that's why meiosis usually leads to the production of gametes. gametes are haploids so that they could combine (egg with sperm cell) and create the whole new organism (adult organism is almost always diploid).
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