Plants are not what?
Options:
- (A) alive
- (B) infected
- (C) green
- (D) animals
- (E) growing
- (F) viruses
- (G) Conifers
- (H) parasites
--
Let's think first: Viruses are not cells at all, so they are neither prokaryotes nor eukaryotes. All plants are eukaryotes. Viruses are not plants.... So the answer is [(F)]

What do mussels eat?
Options:
- (A) bivalves
- (B) sub-units of species
- (C) Something coming from a gland
- (D) mussels
- (E) plankton and nonliving organic
- (F) Something made from fermented ricce
- (G) mollusks
- (H) Microscopic organisms
--
Let's think first: Bivalves feed on plankton and nonliving organic matter. Mussels are bivalve mollusks. Mussels eat plankton and nonliving organic matter.... So the answer is [(E)]

What does the fishhook cactus release during the day but not during the night.
Options:
- (A) heat
- (B) Air
- (C) water
- (D) carbon monoxide
- (E) carbon dioxide
- (F) oxygen
- (G) Energy.
- (H) Energy
--
Let's think first: Plants release oxygen during the day but not during the night. Another kind of plant is the fishhook cactus. The fishhook cactus releases oxygen during the day but not during the night.... So the answer is [(F)]

Playing is one way organisms that have ingestive metabolism learn how to what?
Options:
- (A) propagate
- (B) instinct
- (C) grow
- (D) nutrients
- (E) die
- (F) behave
- (G) survive
- (H) Grow well
--
Let's think first: Playing is one way mammals and other animals learn how to behave. Animals are organisms that have ingestive metabolism. Playing is one way organisms that have ingestive metabolism learn how to behave.... So the answer is [(F)]

What typically travel long distances?
Options:
- (A) slugs
- (B) snails
- (C) home bodies
- (D) manatees
- (E) supersonic
- (F) trains
- (G) humans
- (H) Cars
--
Let's think first: Migrants typically travel long distances. Manatees are a migrant species. Manatees typically travel long distances.... So the answer is [(D)]

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
--
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)]