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A Game of X’s and O’s
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Scoreboard
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X
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O
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X Wins
Click Here if
O Wins
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1
In guinea pigs, the gene for black fur is dominant over the
gene for white fur. If a guinea pig with a gene for black fur
and a gene for white fur mates with a guinea pig with two
genes for white fur, what fraction of their offspring would
likely have black fur?
a. ¼
b. ½
c. ¾
d. 4/4
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B
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Which principle has guided the development of the life forms that
exist at the present time?
a. predator-prey relationships
b. consumer dominance
c. natural selection
d. trait inheritance
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C
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Which of the following is the best way to tell the age of a
fallen oak tree?
a. the length of the tree
b. the thickness of the trunk
c. the number of rings in the trunk
d. the number of branches
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C
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How does the number of chromosomes in a human skin cell
compare to the number of chromosomes in a human egg cell?
a. the skin cell has four times as many chromosomes as the
egg cell
b. the skin cell has twice as many chromosome as the egg
cell
c. the egg cell has twice as many chromosomes as the skin
cell
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B
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Which part of the blood carries most of the oxygen?
a. platelets
b. red blood cells
c. plasma
d. white blood cells
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B
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Which is the most direct source of energy used by a mushroom?
a. it uses sunlight to make energy
b. it uses energy made by plants growing nearby
c. it uses energy from decayed matter in the soil
d. it uses energy from the stored food in its seed
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C
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Which explains why the light-colored Himalayan rabbit can survive
in the snowy mountains while dark-colored rabbits cannot?
a. the light-colored rabbit has no predators in the mountains
b. dark-colored rabbits taste better than light-colored rabbits to
the wolves
c. light-colored rabbits absorb more heat and stay warmer in the
winter than the dark-colored rabbits.
d. predators can readily locate dark-colored rabbits in the snow,
but not light-colored rabbits.
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D
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Herbivores in a food web belong to a group of organisms called
a. producers
c. secondary consumers
b. primary (or lower) consumers
d. decomposers
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B
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A chick is growing in an egg. A new plant is starting to grow within
a bean seed. How are the egg and bean seed alike?
a. both need to be kept in incubators
b. both need sunshine
c. neither one needs water
d. both contain stored food
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D