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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
scientific explanations are tentative and subject to change
B
genetic engineering was involved in the earlier theories
C
structural evidence is the best evolutionary factor to consider
D
natural selection does not occur in hippo - potamuses
2) A stable ecosystem would not contain
A
materials being cycled
B
decomposers
C
consumers without producers
D
a constant source of energy
3) Many viruses infect only a certain type of cell because they bind to certain
A
receptor sites on the surface of the cell
B
other viruses on the surface of the cell
C
hormones in the cell
D
mitochondria 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
species of fish, number of decomposers, and supply of algae
B
droughts, floods, and heat waves
C
hurricanes, packs of wolves, and temperature
D
blizzards, heat waves, and swarms of grasshoppers
6) Mustard gas removes guanine (G) from DNA. For developing embryos, exposure to mustard gas can cause serious deformities because guanine
A
supports the structure of ribosomes
B
stores the building blocks of proteins
C
is part of the genetic code
D
produces energy for genetic transfer
7) Which observation could best be used to indicate an evolutionary relationship between two species?
A
They have similar base sequences.
B
They inhabit the same geographic regions.
C
They have similar fur color.
D
They occupy the same niche.
8) Limited resources contribute to evolutionary change in animals by increasing
A
the carrying capacity for the species
B
the rate of photosynthesis in the population
C
genetic variation within the population
D
competition between members of the species
9) A species in a changing environment would have the best chance of survival as a result of a mutation that has a
A
high adaptive value and occurs in its gametes
B
low adaptive value and occurs in its gametes
C
low adaptive value and occurs in its skin cells
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
pass across the placenta
B
infect the eggs
C
be transported to the embryo in red blood cells
D
be absorbed by the embryo from the mother’s milk
*select an answer for all questions
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