Cancer and tumors are a result of specific types of:
Options:
- (A) organs
- (B) cigarettes
- (C) radiation
- (D) layers of fat
- (E) gene damage
- (F) rays or beams
- (G) Chemical energy
- (H) the skin
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Let's think first: Cancer is a disease in which cells divide out of control. With specific types of gene damage, the cell starts dividing out of control, forming a tumor. Cancer and tumors are a result of specific types of gene damage.... So the answer is [(E)]

If the rate of breathing is too fast or too slow, what my become unstable?
Options:
- (A) our planet
- (B) environment
- (C) state
- (D) all matter
- (E) our star
- (F) blood pH
- (G) cigarettes
- (H) fronts
--
Let's think first: Blood pH may become unbalanced if the rate of breathing is too fast or too slow. When a compound is unbalanced it becomes unbalanced and unstable. Blood pH may become unstable if the rate of breathing is too fast or too slow.... So the answer is [(F)]

What does pollen consist of tiny grains of?
Options:
- (A) it helps plants in growing
- (B) the female sexual organs
- (C) Something with exactly eight protons
- (D) seeds
- (E) Microscopic organisms
- (F) the male sex cells of plants
- (G) bees
- (H) sub-units of species
--
Let's think first: Pollen consists of tiny grains that are the male gametes of plants. Animals that reproduce sexually produce sex cells, or gametes. Pollen consists of tiny grains that are the male sex cells of plants.... So the answer is [(F)]

Mutations are what to evolution?
Options:
- (A) Plants growth
- (B) essential
- (C) optional
- (D) competition
- (E) dangerous
- (F) non essential
- (G) voluntary
- (H) allow growth
--
Let's think first: Mutations are essential for evolution to occur. When that occurs, several things happen. Mutations are essential for evolution happen.... So the answer is [(B)]

In their quest for reproduction, salamanders are assisted by their what?
Options:
- (A) animals
- (B) kinetic energy
- (C) sense of irony
- (D) taste in clothing
- (E) fur and fat
- (F) sense of smell
- (G) chameleon
- (H) insects
--
Let's think first: Most salamanders use their sense of smell to find a mate. Food to survive, mates to reproduce, and water to drink. To reproduce, salamanders are assisted by their sense of smell.... So the answer is [(F)]

What is one thing viruses do not cause?
Options:
- (A) disease
- (B) AIDS
- (C) illness
- (D) cancer
- (E) Ebola
- (F) fever
- (G) death
- (H) smallpox
--
Let's think first: Populations of viruses do not grow through cell division because they are not cells. Cancer is unregulated cell division. Cancer is not caused by viruses.... So the answer is [(D)]