Ques and Ans: What can fatty acids be combined with, in addition to carbon and oxygen?
Options:
- (A) Sodium
- (B) Energy.
- (C) glucose
- (D) Carbon Dioxide
- (E) Fuel cells
- (F) Uranium
- (G) Hydrogen
- (H) Energy
(G)
Logic for the answer: Lipids may consist of fatty acids alone, or they may contain other molecules as well. Lipids Lipids are also composed of carbon, oxygen and hydrogen. Carbon, oxygen, and hydrogen can be combined with fatty acids.

Ques and Ans: What does shivering generate?
Options:
- (A) kinetic
- (B) energy
- (C) friction
- (D) Energy.
- (E) expels heat
- (F) heat
- (G) warmth
- (H) rhythm
(G)
Logic for the answer: Shivering occurs when many muscles contract a little bit all at once. Shivering causes muscle contractions to warm the body. The contractions caused by shivering generates warmth.

Ques and Ans: _ are aerobic
Options:
- (A) goats
- (B) plants
- (C) algae
- (D) moss
- (E) cells
- (F) chloroplast
- (G) complex
- (H) humans
(E)
Logic for the answer: Cells cannot survive without oxygen. Bacteria that require oxygen are aerobic. Cells are aerobic.

Ques and Ans: What increases the productivity and stability of ecosystems?
Options:
- (A) Fully cooking the oysters
- (B) genetic uniformity
- (C) genetic diversity
- (D) extinction
- (E) agriculture
- (F) disease
- (G) Earth orbiting the Sun
- (H) recycling
(C)
Logic for the answer:
Biodiversity increases the productivity and stability of ecosystems. Biodiversity is basically genetic diversity. Genetic diversity increases the productivity and stability of ecosystems.