The correct answer is that t<span>here are probably very few astronauts with twin siblings.
We have to take into consideration that astronauts are a very small group of people and that there is only a small chance that one of them has an identical twin. Although the tests can be hard to do and categorize these kinds of tests and measures are not unethical as long the scientists have the person's permission. Currently, we possess the technology and resources to keep a person in space for a year, but it will be really hard to find more astronauts that have identical twins.
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Well, there are three different zones:
sunlight zone: the brightest; plants and algae can grow there, home to many ocean animals, and shallowest of zones
twilight zones: dimmer and colder water; plants an algae can not liver there; ocean animals that liver here live in darkness and many have big eyes
then there is the midnight zone: super cold and pitch black, food is scarce and few ocean animals liver there.
my best answer would be the sunlight zone...
Answer:
A and C
Explanation:
The myelin makes it whiter so the unmyleinated axons makes it mor gray and also the cell bodies of neurons made up the gray matter in the brain.
Answer:
Long necks were a random genetic change and resulted in the gradual increase of organisms with long necks.
They share lack of back bone, use tube feet to move, and I’m not sure about the open circulatory system because mollusks that fall into cephalopod category have closed ones but all others have open as well as echinoderms