[Q] What kind of animals conserve energy with their hair or fur?
Options:
- (A) fur
- (B) bears
- (C) mammals
- (D) sweating
- (E) frogs
- (F) cactus
- (G) goats
- (H) humans
[A] Here's my solution: Mammals conserve body heat with their hair or fur. Basically, heat is energy. Mammals conserve energy with their hair or fur. The answer is (C).

[Q] Alternative instructions for a single protein are encoded on:
Options:
- (A) alleles
- (B) Acids
- (C) PDAs
- (D) nucleus
- (E) junk DNA
- (F) A computer
- (G) inheritance
- (H) Tail
[A] Here's my solution: Most genes contain the instructions for a single protein. Alleles are alternative forms of a gene. Alleles can contain instructions for making alternative versions of the same single protein. The answer is (A).

[Q] At what trophic level is a plant?
Options:
- (A) lower trophic level
- (B) higher trophic level
- (C) the body's largest organ
- (D) vegetation
- (E) Something that is self-aware
- (F) it needs them
- (G) middle trophic level
- (H) highest trophic level
[A] Here's my solution: Energy is passed up a food chain or web from lower to higher trophic levels. Plants are always at the bottom of the food chain or web. When consumed, energy is passed up from plants from lower to higher trophic levels. The answer is (A).

[Q] How do animals dissipate body heat?
Options:
- (A) sweat
- (B) eat food
- (C) lay in the sun
- (D) insulation
- (E) coat
- (F) osmosis
- (G) fur
- (H) cooling
[A]

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Here's my solution: Evaporation of sweat uses energy, and the energy comes from body heat. Animals are inefficient energy converters. Animals produce body heat which is dissipated by sweat. The answer is (A).