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Mr. Crocco's LE
Test Description: Random
Instructions: Answer all questions to get your test result.
1) Scientists in the United States, Europe, and Africa have now suggested that the hippopotamus is a relative of the whale. Earlier studies placed the hippo as a close relative of wild pigs, but recent studies have discovered stronger evidence for the c
A
natural selection does not occur in hippo - potamuses
B
genetic engineering was involved in the earlier theories
C
structural evidence is the best evolutionary factor to consider
D
scientific explanations are tentative and subject to change
2) A stable ecosystem would not contain
A
a constant source of energy
B
decomposers
C
materials being cycled
D
consumers without producers
3) Many viruses infect only a certain type of cell because they bind to certain
A
mitochondria in the cell
B
receptor sites on the surface of the cell
C
other viruses on the surface of the cell
D
hormones in the cell
4) The respiratory system includes a layer of cells in the air passages that clean the air before it gets to the lungs. This layer of cells is best classified as
A
an oranelle
B
an organ
C
a tissue
D
an organ system
5) Abiotic factors that could affect the stability of an ecosystem could include
A
droughts, floods, and heat waves
B
blizzards, heat waves, and swarms of grasshoppers
C
hurricanes, packs of wolves, and temperature
D
species of fish, number of decomposers, and supply of algae
6) Mustard gas removes guanine (G) from DNA. For developing embryos, exposure to mustard gas can cause serious deformities because guanine
A
stores the building blocks of proteins
B
is part of the genetic code
C
produces energy for genetic transfer
D
supports the structure of ribosomes
7) Which observation could best be used to indicate an evolutionary relationship between two species?
A
They have similar base sequences.
B
They occupy the same niche.
C
They have similar fur color.
D
They inhabit the same geographic regions.
8) Limited resources contribute to evolutionary change in animals by increasing
A
competition between members of the species
B
the carrying capacity for the species
C
the rate of photosynthesis in the population
D
genetic variation within the population
9) A species in a changing environment would have the best chance of survival as a result of a mutation that has a
A
low adaptive value and occurs in its skin cells
B
high adaptive value and occurs in its gametes
C
low adaptive value and occurs in its gametes
D
high adaptive value and occurs in its skin cells
10) German measles is a disease that can harm an embryo if the mother is infected in the early stages of pregnancy because the virus that causes German measles is able to
A
be absorbed by the embryo from the mother’s milk
B
pass across the placenta
C
infect the eggs
D
be transported to the embryo in red blood cells
*select an answer for all questions
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