Roots, stems and leaves continue to do what throughout their lives?
Options:
- (A) die
- (B) edible
- (C) expand
- (D) grow
- (E) growth
- (F) spread
- (G) live
- (H) propagate
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Let's think first: Most plants continue to grow throughout their lives. All seed plants have roots, a stem, and leaves. Roots, stems and leaves continue to grow throughout their lives.... So the answer is [(D)]

Marine animals find these to be a great source of food:
Options:
- (A) grain
- (B) nutrient
- (C) sponges
- (D) Energy.
- (E) sea vents
- (F) sodium
- (G) Energy
- (H) fungi
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Let's think first: Sponges are a source of food for many species of fish. Fish and other marine animals abound here. Sponges are a source of food for many marine animals.... So the answer is [(C)]

Mutation leads to _.
Options:
- (A) Devolution
- (B) Plants growth
- (C) rapid expansion
- (D) Evolution.
- (E) Degeneration
- (F) Extinction
- (G) massive damage
- (H) anemia
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Let's think first: Mutation creates new genetic variation in a gene pool. Genetic variation is the raw material for evolution. Mutation leads to evolution.... So the answer is [(D)]

Fertilization of what would produce a diploid zygote?
Options:
- (A) ovulation cell
- (B) ova
- (C) p53
- (D) eggs
- (E) diploid tissue
- (F) fertilization cell
- (G) corn
- (H) ovum
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Let's think first: Fertilization of gametes produces a diploid zygote. Examples of gametes are ova and spermatozoa. Fertilization of ova produces a diploid zygote.... So the answer is [(B)]

What often precedes mating?
Options:
- (A) A Greek letter
- (B) competition
- (C) friendship
- (D) birth of a child
- (E) death
- (F) Chemical energy
- (G) pregnancy
- (H) sweating
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Let's think first: Mating is generally preceded by courtship. Friendship usually precedes courtship, and courtship, marriage. Friendship often comes before mating.... So the answer is [(C)]

What type of water do sea tigers live in?
Options:
- (A) warm-blooded
- (B) survival
- (C) Frozen
- (D) liquid
- (E) Salt water
- (F) Fresh
- (G) Absorb light
- (H) Evaporated
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Let's think first: Marine biomes are found in the salt water of the ocean. Another animal that lives within the Marine Biome is a sea tiger. Sea tigers live in salt water.... So the answer is [(E)]