What helps prokaryotes move?
Options:
- (A) sensory neurons
- (B) heat energy
- (C) Feet.
- (D) Wheels.
- (E) Hair-like projections.
- (F) Moving vans.
- (G) Chemical energy
- (H) kinetic energy
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Let's think first: Flagella help prokaryotes move. Flagella are hair-like projections from the surface of cells. Hair-like projections from the surface of cells that help prokaryotes move.... So the answer is [(E)]

Alternative instructions for a single protein are encoded on:
Options:
- (A) alleles
- (B) Acids
- (C) PDAs
- (D) nucleus
- (E) junk DNA
- (F) A computer
- (G) inheritance
- (H) Tail
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Let's think first: Most genes contain the instructions for a single protein. Alleles are alternative forms of a gene. Alleles can contain instructions for making alternative versions of the same single protein.... So the answer is [(A)]

What is the microscopic building block of any living being?
Options:
- (A) trees
- (B) cell
- (C) oxygen
- (D) moss
- (E) molecule
- (F) plants
- (G) blood
- (H) life
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Let's think first: Cells are the microscopic building blocks of organisms. Any living being is an organism. Cells are the microscopic building blocks of living beings.... So the answer is [(B)]

Running water is better able to dissolve oxygen and nutrients than what?
Options:
- (A) pouring water
- (B) scarce resources
- (C) ocean water
- (D) river water
- (E) acetic acid
- (F) Veins and arteries.
- (G) an organism's body
- (H) stagnant water
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Let's think first: Running water is better able to dissolve oxygen and nutrients than standing water. If the water stands still and becomes stagnant, it can become a breeding ground for mosquitoes. Running water is better able to dissolve oxygen and nutrients than stagnant water.... So the answer is [(H)]

What does an earthworm do that would help plants?
Options:
- (A) reusing materials
- (B) It helps them survive
- (C) eat the plant
- (D) scare away birds
- (E) reproduce
- (F) hydrate their cells
- (G) burrow in the dirt
- (H) eat all the dirt
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Let's think first: Earthworm burrows help aerate soil, which is also good for plants. Dirt is really misplaced soil. Earthworm burrows help aerate dirt, which is also good for plants.... So the answer is [(G)]

Fertilization of what would produce a diploid zygote?
Options:
- (A) fetus
- (B) seeds
- (C) H 2 O
- (D) bamboo
- (E) offspring
- (F) eggs
- (G) apples
- (H) sperm
--
Let's think first: Fertilization of gametes produces a diploid zygote. Female gametes are called eggs. Fertilization of eggs produces a diploid zygote.... So the answer is [(F)]