I dont know the first one sorry but the others are:
12) B. The organism would suffer as its cells would be less able to provide the energy needed to carry out life functions.
13) D. The central vacuoles in the cells lose water and can no longer help support the cells.
14) A. It acts as a framework inside the endoplasmic reticulum and keeps it from collapsing.
15) D. The cell's energy level will diminish as the enzyme decreases.
16) C. Whales are able to conserve oxygen better than humans.
17) A. Glycolysis
18) i dont know this one but maybe B
19) B. It is turned into more chlorophyll for the plant.
20) B. The chloroplasts would be unable to generate ATP.
Answer: The types of elements in the compound.
Explanation: An ionic bond consists of a metal and a nonmetal, while covalent consists of both nonmetals with similar electronegativities.
Is the 1st step in asking ecological questions
Your answer is Deoxyribonucleic, you can find it in DNA (and RNA) with adenine, thymine ecc...