Answer:
Cell membrane
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Answer: Option (a) is the correct option that is largest percentage of oxygen is present in both earth's crust and human body.
Explanation: Oxygen is present in large amounts both in earth's crust and human body. The percentage of oxygen in earth's crust is 46.6% and the percentage of oxygen in the body is about 66.6%. So it is concluded that both human body and earth's crust have high percentage of oxygen.
Answer:
a negative charge overall
Explanation:
when an atom loses electrons, because the protons are more than the electrons now, the atom becomes positive
when an atom gains electrons, because the number of electrons is more than the protons, the atom has a negative charge
Answer: The answer is option C
Explanation:
Option c- Beta carotene had not yet been absorbed by the body in sufficient quantities to influence the amount of vitamin A being produced. Beta carotene is an organic, red-colored pigment that is found to be abundant in plants and fruits. it is a member of the Carotenes. Beta carotene is an inactive form (precursor) to vitamin A.
<span>Animals must switch between ectotherm and endotherm methods. Ectotherms and edotherms are diiferent types of animals, which use different approches for maintaing body temperature. </span>