Living things interacting get energy from what?
Options:
- (A) Light
- (B) flares
- (C) water
- (D) The Sun
- (E) wind
- (F) glucose
- (G) sunlight
- (H) food
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Let's think first: Most ecosystems get energy from sunlight. Life Living things interact in ecosystems. Living things interacting get energy from sunlight.... So the answer is [(G)]

Which has a unique water vascular system?
Options:
- (A) roots
- (B) trees
- (C) Conifers
- (D) Echinoids
- (E) fur seals
- (F) Most plants
- (G) ferns
- (H) bushes
--
Let's think first: Echinoderms have a unique water vascular system with tube feet. Another group of echinoderms are the echinoids. Echinoids have unique water vascular system was tube feet.... So the answer is [(D)]

What do most salamanders use to find a mate?
Options:
- (A) olfaction
- (B) sound
- (C) seduction
- (D) fur and fat
- (E) heat energy
- (F) air
- (G) environment
- (H) water
--
Let's think first: Most salamanders use their sense of smell to find a mate. Olfaction is the sense of smell. Most salamanders use olfaction to find a mate.... So the answer is [(A)]

What is a form of vesicle transport that requires energy?
Options:
- (A) absorption
- (B) glucose
- (C) Leptospirosis
- (D) a solute
- (E) Energy.
- (F) bioaerosols
- (G) direct energy
- (H) heat or cold
--
Let's think first: Vesicle transport requires energy, so it is also a form of active transport. Absorption comes from active transport. Absorption is a form of vesicle transport that requires energy.... So the answer is [(A)]

Heavy metals are _.
Options:
- (A) emissions
- (B) dangerous
- (C) bent
- (D) homogenous
- (E) antigens
- (F) vehicles
- (G) fossil fuels
- (H) heat energy
--
Let's think first: Antigens are molecules that the immune system recognizes as foreign to the body. Heavy metals are, in general, foreign to the body. Heavy metals are antigens.... So the answer is [(E)]

Some viruses do not affect the host and live in what kind of state in the body?
Options:
- (A) inactive
- (B) devastating
- (C) recovery
- (D) negative
- (E) hyperactive
- (F) sleep
- (G) excited
- (H) cold
--
Let's think first: Some viruses live in a dormant state inside the body. When inactive or dormant, Dendrobiums require little or no fertilizer. Some viruses live in an inactive state inside the body.... So the answer is [(A)]