A reason why early living organisms on Earth could not have survived on the surface was because the lack of an ozone layer. The answer is number 1.
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The cat and the kangaroo.
They are the closest in the "food web"
No, daughter cells refer to cell division. In mitosis, the daughter cells will be identical to the parent cell. However, in meiosis, there will be 4 daughter cells, each genetically unique from one another and the parent cell. This is because of crossing over that occurs in prophase I.
