At what trophic level is a plant?
Options:
- (A) lower trophic level
- (B) higher trophic level
- (C) the body's largest organ
- (D) vegetation
- (E) Something that is self-aware
- (F) it needs them
- (G) middle trophic level
- (H) highest trophic level
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Let's think first: Energy is passed up a food chain or web from lower to higher trophic levels. Plants are always at the bottom of the food chain or web. When consumed, energy is passed up from plants from lower to higher trophic levels.... So the answer is [(A)]

What do all vertebrates have that invertebrates don't?
Options:
- (A) sensory neurons
- (B) fur and fat
- (C) bones and joints
- (D) a jaw bone
- (E) kinetic energy
- (F) Chemical energy
- (G) a spinal column
- (H) a set of gills
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Let's think first: Vertebrates are all chordates that have a backbone. Invertebrates are animals who lack a backbone or spinal column. Vertebrates are all chordates that have a spinal column.... So the answer is [(G)]

Which of the following do not grow using mitosis?
Options:
- (A) skin cells
- (B) genus
- (C) fungi
- (D) lung cells
- (E) blood cells
- (F) parasites
- (G) viruses
- (H) bacteria
--
Let's think first: Populations of viruses do not grow through cell division because they are not cells. Mitosis is cell division. Populations of viruses do not grow through mitosis because they are not cells.... So the answer is [(G)]

Food consists of organic molecules that store heat where?
Options:
- (A) in their chemical bonds
- (B) the rest of the body
- (C) the environment
- (D) by keeping them warm
- (E) Earth orbiting the Sun
- (F) Earth revolving around the sun
- (G) it helps plants in growing
- (H) the body's largest organ
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Let's think first: Food consists of organic molecules that store energy in their chemical bonds. Basically, heat is energy. Food consists of organic molecules that store heat in their chemical bonds.... So the answer is [(A)]

What feeds on plankton and nonliving organic matter?
Options:
- (A) bacteria
- (B) barnacles
- (C) animals
- (D) sharks
- (E) pythons
- (F) graptolites
- (G) molluscs
- (H) bears
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Let's think first: Bivalves feed on plankton and nonliving organic matter. Bivalve molluscs are very common. Molluscs feed on plankton and nonliving organic matter.... So the answer is [(G)]

What lives in large colonies?
Options:
- (A) koalas
- (B) swea
- (C) voles
- (D) bees
- (E) bats
- (F) Birds
- (G) cats
- (H) bears
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Let's think first: Insects may live in large colonies and have complex social behaviors. Honey Bee Honey bees are insects that live in a hive and make honey. Bees live in large colonies and have complex social behaviors.... So the answer is [(D)]