[Q] Trees have woody stems covered with what?
Options:
- (A) food and shelter
- (B) smooth ridges
- (C) looseness
- (D) protective layer
- (E) Organic compounds
- (F) plastic sheet
- (G) heat energy
- (H) thin metal
[A] Here's my solution: Trees have woody stems covered with bark. During the stripping, the protective layer of inner bark is removed. Trees have woody stems covered with a protective layer. The answer is (D).

[Q] Echidnas reproduce how?
Options:
- (A) asexually
- (B) by indirect light
- (C) spread flower seeds
- (D) during the day
- (E) by birthing live young
- (F) by laying eggs
- (G) by budding
- (H) with their fur
[A] Here's my solution: Monotremes are mammals that reproduce by laying eggs. Examples of monotremes are the Platypus and Echidna. Echidnas reproduce by laying eggs. The answer is (F).

[Q] Some birds are pollinators that co-evolved with what other type of organism?
Options:
- (A) animals
- (B) humans
- (C) vegetation
- (D) producers
- (E) parasites
- (F) warm-blooded
- (G) Conifers
- (H) mammals
[A] Here's my solution: Some birds are pollinators that co-evolved with plants. If the plant is green, it is a producer. Some birds are pollinators that co-evolved with producers. The answer is (D).

[Q] What usually results from getting shots?
Options:
- (A) heat produced
- (B) susceptibility to disease
- (C) limb amputation
- (D) a lot of human deaths
- (E) death and devastation
- (F) healing
- (G) resistance to disease
- (H) confusion
[A]
Here's my solution: Immunity results from immunization. Immunization records with all required shots. Resistance to disease results from getting shots. The answer is (G).