Where is ecosystem complexitiy generally least?
Options:
- (A) humans disturb it
- (B) frontal zones
- (C) in lakes
- (D) at the ocean
- (E) our planet
- (F) at the poles
- (G) mouth of rivers
- (H) at the equator
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Let's think first: Biodiversity generally increases from the poles to the equator. Biodiversity contributes to ecosystem complexity. Ecosystem complexity generally increases from the poles to the equator.... So the answer is [(F)]

What does shivering generate?
Options:
- (A) kinetic
- (B) energy
- (C) friction
- (D) Energy.
- (E) expels heat
- (F) heat
- (G) warmth
- (H) rhythm
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Let's think first: Shivering occurs when many muscles contract a little bit all at once. Shivering causes muscle contractions to warm the body. The contractions caused by shivering generates warmth.... So the answer is [(G)]

What supplement would a human take to aid in breaking down food?
Options:
- (A) sweating
- (B) Energy
- (C) Enzymes.
- (D) Calcium supplements.
- (E) Energy.
- (F) Antacid.
- (G) Protein supplement.
- (H) evaporation
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Let's think first: Digestion is the process of breaking down food into components the body can absorb. Digestive enzymes are necessary for a complete digestion. Enzymes break down food into components the body can absorb.... So the answer is [(C)]

What organelles that are found in the cells of mosses.
Options:
- (A) chloroplasts
- (B) epidermal
- (C) sensory neurons
- (D) an organism's body
- (E) more abundant
- (F) Epidermis
- (G) produce light
- (H) it needs them
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Let's think first: Chloroplasts are organelles that are found in the cells of plants and algae. Mosses are nonvascular plants. Chloroplasts are organelles that are found in the cells of mosses.... So the answer is [(A)]

Bottleneck effect can occur with
Options:
- (A) external migration
- (B) direct damage to the lungs
- (C) Movement of an air mass
- (D) competition
- (E) if humans disturb bears
- (F) competing for resources
- (G) Plant growth is reduced
- (H) Temperature changing
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Let's think first: Bottleneck effect occurs when a population suddenly gets much smaller. Population growth is reduced by external migration. Bottleneck effect occurs with external migration.... So the answer is [(A)]

Protein is made from:
Options:
- (A) Acids
- (B) DNA code
- (C) fur and fat
- (D) insects
- (E) animals
- (F) Energy.
- (G) Energy
- (H) food
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Let's think first: Chromosomes contain genes, which code for proteins. Information on DNA is organized into genes. DNA codes for proteins.... So the answer is [(B)]