Q: Living organisms are comprised of organic compounds, which are molecules built around what element? Choices: - oxygen - silicon - helium - carbon A:
carbon

(Question)
Q: Natural selection can only take place if there is variation, or differences, among individuals in a population. importantly, these differences must have some genetic basis; otherwise, the selection will not lead to change in this? Choices: - fertilization - spontaneous mutation - mass extinction - next generation A:
(Answer)
next generation

Ques: Q: How many oxygen ions make up an ozone molecule? Choices: - eight - one - five - three A:
Ans: three

(Q).
Q: What is the largest object in the solar system? Choices: - the orbit - the earth - jupiter - the sun A:
(A).
the sun

Ques:Q: One molecule of carbon dioxide consists of 1 atom of carbon and 2 atoms of what element? Choices: - methane - hydrogen - nitrogen - oxygen A:

Ans:oxygen

Q: What consists of all the living things and nonliving things interacting in the same area? Choices: - biodiversity - habitat - biome - ecosystem A:
ecosystem