A is your answer u welcome
There are three main layers of skin. The epidermis, the outermost layer of skin creates a waterproof barrier and creates our skin tone. The dermis contains tough connective tissue, hair follicles and sweat glands. The last layer is the hypodermis which is made of fat and connective tissue
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you are correct sir. It is a controlled experiment
Explanation:
Answer:
new species often appear at about the same time.
Explanation:
A biotic crisis or a mass extinction crisis is a rapid and widespread decrease in biodiversity. There is a clear change after the mass extinction, in the diversity and of multicellular organisms.
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