Practice Quiz

MCAS Biology Practice - Question List

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126. What is the primary function of the large intestine?
  1. to digest proteins
  2. to absorb nutrients
  3. to break down complex carbohydrates
  4. to remove water from undigested waste
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127. Which of the following best describes the result of a mutation in an organism’s DNA?
  1. The mutation may produce a zygote.
  2. The mutation may cause phenotypic change.
  3. The mutation causes damage when it occurs.
  4. The mutation creates entirely new organisms.
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128. Starting in 1954, commercial fishers in the northwest Pacific were paid by weight, rather than by the individual fish, for pink salmon. The fishers increased the use of a type of net that selectively catches larger fish. Which of the following effects did this change in fishing techniques most likely have on the salmon population over the next 20 years?
  1. The average body size of the salmon population increased significantly.
  2. The average body size of the salmon population decreased significantly.
  3. The average body size of the males in the salmon population increased and the average body size of females in the salmon population stayed the same.
  4. The average body size of the males in the salmon population stayed the same and the average body size of the females in the salmon population increased.
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129. A hurricane sweeps across a small Caribbean island, killing 50 percent of the herbivore species on the island. Which of the following is the most immediate result?
  1. a reduction in biodiversity
  2. an acceleration of the carbon cycle
  3. an increase in predator populations
  4. a decline in decomposer populations
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130. Caytonia is an extinct plant that existed between 200 and 140 million years ago. It had reproductive structures that resemblestructures in modern flowering plants. How do scientists know about the structures of this ancient extinct plant?
  1. Scientists study the DNA sequences of Caytonia.
  2. Scientists genetically engineer modern plants to produce Caytonia.
  3. Scientists excavate and examine the fossilized remains of Caytonia.
  4. Scientists observe the adaptations of plants in habitats resembling those of Caytonia.
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