(question). What can chordates go through?
Options:
- (A) disease
- (B) loss
- (C) skin
- (D) alveoli
- (E) death
- (F) painful
- (G) shock
- (H) illness
(answer). Chordates have a complete digestive system and a closed circulatory system. Shock is a disruption of the circulatory system. Chordates can experience shock.
The answer is (G)

(question). Some agents that infect cells live in what state inside the body?
Options:
- (A) solid
- (B) conscious
- (C) expelled
- (D) bacteria
- (E) infected
- (F) dormant
- (G) cellular
- (H) protected
(answer). Some viruses live in a dormant state inside the body. Viruses Viruses are agents that infect cells, yet lack many of the characteristics of life. Some agents that infect cells live in a dormant state inside the body.
The answer is (F)

(question). 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
(answer). 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)

(question). What has a layer of fat under the skin to help insulate the body?
Options:
- (A) goats
- (B) snakes
- (C) hamburgers
- (D) animals
- (E) humans
- (F) rabbit
- (G) bears
- (H) fur
(answer).
Mammals have a layer of fat under the skin to help insulate the body. All humans are mammals. Humans have a layer of fat under the skin to help insulate the body.
The answer is (E)