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
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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)]

What enables bones to perform movement?
Options:
- (A) contraction
- (B) Energy
- (C) sensory neurons
- (D) looseness
- (E) Chemical energy
- (F) Vibrates
- (G) fur and fat
- (H) layers of fat
--
Let's think first: Muscles can only contract. Bones work with muscles to perform movement. Contraction enables bones to perform movement.... So the answer is [(A)]

Plasma cells are activated b cells that secrete what?
Options:
- (A) Leptospirosis
- (B) Activated charcoal
- (C) Cellular phone services
- (D) Sweat
- (E) major threat to health
- (F) Warriors of the body.
- (G) Something that causes allergies
- (H) Chemical energy
--
Let's think first: Plasma cells are activated B cells that secrete antibodies. Antibodies act as warriors. Plasma cells are activated B cells that secrete warriors.... So the answer is [(F)]

What happens when people flow into or out of a population?
Options:
- (A) genetic morphing
- (B) death
- (C) gene flow
- (D) movement
- (E) generic flow
- (F) interact
- (G) competition
- (H) gene expression
--
Let's think first: Gene flow occurs when individuals move into or out of a population. People are individuals, and each person has different needs. Gene flow occurs when people move into or out of a population.... So the answer is [(C)]

One example of an annelid has how many hearts?
Options:
- (A) three
- (B) Five
- (C) white
- (D) warm
- (E) four
- (F) strong
- (G) long
- (H) small
--
Let's think first: Annelids are worms such as the familiar earthworm. An earthworm has five hearts. An animal that has five hearts is an annelid.... So the answer is [(B)]

What are one celled organisms?
Options:
- (A) Plants growth
- (B) slime molds
- (C) warm-blooded
- (D) peachleaf willow
- (E) honeybees
- (F) orchids
- (G) Most plants
- (H) produce light
--
Let's think first: Slime molds are fungus-like protists commonly found on rotting logs and compost. Protists are one celled organisms. Slime molds are one celled organisms.... So the answer is [(B)]