_ bind to allergens.
Options:
- (A) to stay warm
- (B) mammals
- (C) fur and fat
- (D) animals
- (E) protect them
- (F) Most plants
- (G) Antibodies
- (H) Chemical energy
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Let's think first: Antibodies are large, Y-shaped proteins that recognize and bind to antigens. Allergens are also called Antigens. Antibodies bind to allergens.... So the answer is [(G)]

What tells a cell what to do?
Options:
- (A) electricity
- (B) proteins
- (C) A computer
- (D) Energy
- (E) nerves
- (F) sweating
- (G) heat energy
- (H) Energy.
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Let's think first: Molecules of DNA are encoded with instructions that tell cells what to do. DNA encodes the information for protein sequences. Proteins tell cells what to do.... So the answer is [(B)]

Fertilization of what leads to formation of multicellular embryo in venter
Options:
- (A) seeds
- (B) grow
- (C) epidermal
- (D) pollen
- (E) Deposition
- (F) fertile
- (G) orchids
- (H) gametes
--
Let's think first: Fertilization of gametes produces a diploid zygote. Diploid zygote forms multicellular embryo in venter. Fertilization of gametes leads to formation of multicellular embryo in venter.... So the answer is [(H)]

What occurs when the tension of cell walls are eased?
Options:
- (A) Sleep
- (B) exercise
- (C) friction
- (D) Exfoliation
- (E) recovery
- (F) dilation
- (G) sweating
- (H) murmur
--
Let's think first: Dilation occurs when cell walls relax. Relaxation promotes relaxation and easing of tension. Dilation occurs when the tension of cell walls are eased.... So the answer is [(F)]

What can most humans only survive a few days without?
Options:
- (A) oxygen
- (B) food
- (C) edema
- (D) sex
- (E) sodium
- (F) socialization
- (G) water
- (H) liquid
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Let's think first: Most people can survive only a few days without water. All people belong to the human family. Most humans can only survive a few days without water.... So the answer is [(G)]

Producers use energy and inorganic molecules for what?
Options:
- (A) neutralizing threats
- (B) dismissal of nutrients
- (C) heat produced
- (D) Transfers energy
- (E) retention of nutrients
- (F) decomposition
- (G) agriculture
- (H) iron in water
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Let's think first: Producers use energy and inorganic molecules to make food. Food preparation for retention of nutrients is included. Producers use energy and inorganic molecules for the retention of nutrients.... So the answer is [(E)]