What animals belong to the largest phylum of invertibrates?
Options:
- (A) plants
- (B) parasites
- (C) octopuses
- (D) tortoises
- (E) eartworms
- (F) insects
- (G) mammals
- (H) animals
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Let's think first: Arthropods are the largest phylum of invertebrates. Insects are the largest group of arthropods. Insects belong to the largest phylum of invertibrates.... So the answer is [(F)]

Most organisms live mainly in
Options:
- (A) shallow coastal waters
- (B) the environment
- (C) soil
- (D) trees
- (E) Earth orbiting the Sun
- (F) ocean water
- (G) plasma
- (H) salt and water.
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Let's think first: Marine species live mainly in shallow coastal waters. Most marine organisms live near the surface. Most organisms live mainly in shallow coastal waters.... So the answer is [(A)]

Great egrets get food by doing what?
Options:
- (A) sleeping
- (B) eating other living things
- (C) Transfers energy
- (D) converting mass to energy
- (E) Something coming from a gland
- (F) photosynthesis
- (G) dying
- (H) competing for resources
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Let's think first: Heterotrophs get food by eating other living things. Great egrets are heterotrophs . Great egrets get food by eating other livings things.... So the answer is [(B)]

Lipid stores are used by plants and animals for what?
Options:
- (A) energy.
- (B) liver
- (C) glycoproteins
- (D) survival
- (E) energy
- (F) growth
- (G) blood sugar
- (H) food
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Let's think first: Organisms use lipids to store energy. Plants and animals are organisms. Plants and animals use lipids to store energy.... So the answer is [(E)]

What is the effect of a population suddenly getting much smaller?
Options:
- (A) major threat to health
- (B) Decreased precipitation
- (C) a lot of human deaths
- (D) movement of tectonic plates
- (E) it is unpredicatbale
- (F) If they can no longer get food
- (G) Plant growth is reduced
- (H) enormous damage to homes
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Let's think first: Bottleneck effect occurs when a population suddenly gets much smaller. Effects of bottlenecks are unpredictable . When a population suddenly gets much smaller the effects are unpredictable.... So the answer is [(E)]

The molecules secreted by activated b cells are part of the:
Options:
- (A) immune system
- (B) Organic compounds
- (C) Energy.
- (D) an organism's body
- (E) acetic acid
- (F) harmful substances
- (G) Chemical energy
- (H) Veins and arteries.
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Let's think first: Plasma cells are activated B cells that secrete antibodies. Antibodies are manufactured by the immune system. Plasma cells are activated B cells that secrete immune system molecules.... So the answer is [(A)]