(question). Some precipitation that falls on land soaks into the ground, into:
Options:
- (A) wells and springs
- (B) mountains
- (C) clouds
- (D) it flows to a lower level
- (E) water vapor
- (F) sedimentary rocks
- (G) deltas
- (H) loose dirt
(answer). Some precipitation that falls on land may soak into the ground, becoming groundwater. Wells and springs are supplied by groundwater. Some precipitation that falls on land soaks into the ground, into wells and springs.
The answer is (A)

(question). Which has specialized reproductive organs?
Options:
- (A) Clouds
- (B) Conifers
- (C) River
- (D) peachleaf willow
- (E) Venus flytrap
- (F) animals
- (G) mammals
- (H) Mountain
(answer). Plants have specialized reproductive organs. Most people know that the Venus Flytrap is a carnivorous plant. The Venus Flytrap has specialized reproductive organs.
The answer is (E)

(question). Organisms in a marine biome must be be adapted to what in the water?
Options:
- (A) mud
- (B) Nutrients
- (C) sodium
- (D) toxins
- (E) motion
- (F) sugar
- (G) energy
- (H) an anion
(answer). Organisms that live in marine biomes must be adapted to the salt in the water. Another name for salt is sodium. Organisms that live in marine biomes must be adapted to the sodium in the water.
The answer is (C)

(question). What happens to brain cells when the air supply is cut off?
Options:
- (A) strangulation
- (B) breathe
- (C) lead poisoning
- (D) death
- (E) hippocampus
- (F) painful
- (G) loss
- (H) die
(answer).
Brain cells die quickly if their oxygen supply is cut off. Air contains oxygen. Brain cells die quickly if their air supply is cut off.
The answer is (D)