BIOLOGY MIDDLE SCHOOL

One of the major elements of natural selection is that all species have genetic A) digression. B) melanism. C) stability. D) variation.

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Answer 1
Answer:

Answer:

D. variation

Explanation:
Answer 2
Answer:

Answer:

The answer would be D) Variation

Explanation:

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Wind energy is plentiful in regions with vast open spaces it is a non polluting renewable resource what could be an economic factor that makes the use of this resource less feasible then non renewable resource even in such regions

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wind power

using the power of wind turbines

D) Wind farms occupy a lot of land, which is an expensive commodity.

How is diffusion related to smelling the odor of a skunk that is far away

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Diffusion is the idea that when a solute enters an area with a lower concentration than the solute, it will mix into the area. So the skunk odor has a higher solute concentration then the atmosphere it's released into, so when it is released it will diffuse across a wider area in order to try and level out the level of concentration. This means it can be smelt from further away. 

Similarities between plant and animal cells.​

Answers

Answer:

Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal elements.

Explanation:
Plant and animal cells are similar because they are both eukaryotic cells

Please Help Me I Give Thanks!!!!!

Answers

1. Once crops are harvested for human consumption, the natural supply of nutrients in the soil must be "re-filled". This is why farmer's add nutrients to their soils.
3. Most organisms, including humans, can't use the free gaseous form of nitrogen found in the air. We need other organisms and natural processes to "fix" nitrogen into a solid form that plants and animals can use. Most of the nitrogen that plants and animals use is made by bacteria.

I could only answer questions 1 and 3 for you but I hope I was able to help!

Compare and contrast cell communication by nerve signal with cell communication by ion-linked channel receptors... please help fast

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Nerve cells communicate by sending an electrical signal through an axon, from this molecules get released into the synapse this then binds itself onto receptor sites. With ion-linked channel receptors, the ligands get binded to a protein. The ion channels are then opened and the proccess gets repeated. Does that help?
Nerve cells communicate by sending an electrical signal through an axon, from this molecules get released into the synapse this then binds itself onto receptor sites

Throughout history, which of these is an ecological impact associated with agriculture?

Answers

Answer:

soil erosion is the answer
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