17. When table salt (NaCl) is produced, which of the following best describes the actions of the sodium (Na) and chlorine (CI) atoms?
A. Sodium atoms replace chlorine atoms.
B. Sodium and chlorine atoms mix together.
C. Sodium atoms dissolve in chlorine atoms.
D. Sodium and chlorine atoms bond chemically.

Sand spinifex grass is adapted to growing on sand dunes. it is a rapidly spreading plant and the creeping runners produce new root systems. which of these best explains the benefits of these features? a. it limits water loss through the leaves. b. it provides support by anchoring the plant. c. it protects the plant from predators. d. it allows the plant to tolerate salt. reset submit

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Describe the layers of the suns atmosphere?