q: How do platypus lay eggs?
Options:
- (A) epidermis and dermis
- (B) on a flat plane
- (C) in a tree
- (D) fur and fat
- (E) during the day
- (F) it keeps an organism warm
- (G) in a dug out area
- (H) in the water
a: (G)... Explanation: Platypus females lay their eggs in a burrow. Burrows dug by badgers are also important in many areas. Platypus females lay eggs in a dug out area. That's why the answer is (G).

q: _ are an essential nutrient for animals.
Options:
- (A) Energy
- (B) Chemicals
- (C) trees
- (D) potatoes
- (E) Acids
- (F) allow growth
- (G) store
- (H) Proteins
a: (H)... Explanation: All animals are heterotrophs. Proteins are an essential nutrient for heterotrophs . Proteins are an essential nutrient for animals. That's why the answer is (H).

q: What will make human temperatures go in a different direction from what sweating would do?
Options:
- (A) humidity
- (B) shivering
- (C) improve
- (D) energy usage
- (E) a blazing fire
- (F) hot air
- (G) harm them
- (H) Damages them
a: (B)... Explanation: Sweating reduces body heat. Shivering produces heat in the body. Sweating and shivering have different effects on our core temperatures. That's why the answer is (B).

q: Atoms make up many things, like what?
Options:
- (A) glass
- (B) matter
- (C) A computer
- (D) Fuel cells
- (E) copper
- (F) viruses
- (G) Light
- (H) Energy
a:
(F)... Explanation: Viruses are usually considered to be nonliving. All matter, living and nonliving, is made up of atoms. Viruses are made up of atoms. That's why the answer is (F).