[Q] Energy enters what in the form of sunlight or chemical compounds.
Options:
- (A) biomes
- (B) fire
- (C) light
- (D) Energy.
- (E) Energy
- (F) LEDs
- (G) propagate
- (H) photons
[A] Here's my solution: Energy enters ecosystems in the form of sunlight or chemical compounds. Biomes are global ecosystems. Energy enters biomes in the form of sunlight or chemical compounds. The answer is (A).

[Q] Something that helps prevent hypothermia:
Options:
- (A) dehydration
- (B) freezing
- (C) water
- (D) head hair
- (E) cold
- (F) electricity
- (G) Exfoliation
- (H) sweating
[A] Here's my solution: Head hair is especially important in preventing heat loss from the body. Hypothermia Loss of body heat caused by exposure is called Hypothermia. Head hair is especially important in preventing hypothermia. The answer is (D).

[Q] What do frogs breathe with when they are adults?
Options:
- (A) skin
- (B) fins
- (C) lungs
- (D) oxygen
- (E) gills
- (F) air
- (G) Energy
- (H) Gases
[A] Here's my solution: Most amphibians breathe with gills as larvae and with lungs as adults. All frogs are amphibians. Frogs breathe with gills as larvae and with lungs as adults. The answer is (C).

[Q] What might have an envelope of proteins and enzymes?
Options:
- (A) fur seals
- (B) some viruses
- (C) Most plants
- (D) a fish
- (E) animal transport
- (F) animals
- (G) chickens
- (H) it needs them
[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: Some viruses have an envelope of phospholipids and proteins. Phospholipases are the enzymes that degrade phospholipids . Some viruses have an envelope of enzymes and proteins. The answer is (B).