AnswersLPS Biology CR - MP1Unit Test

Unit Test — Unit test Answers

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Review the chart, which shows the population sizes of three African animals in 1990 and in 2000. Population Estimates of Animals in Africa in 1990 and in 2000 19902000Lions100,00047,000Cheetahs25,0007,500Zebras750,000450,000Which explanation is best supported by the numbers in the chart?

A
Lion and cheetah populations compete for the food source of zebras, and lions outcompete cheetahs.
B
The dwindling zebra population has led to the decline of the predator lion and cheetah populations.
C
Overhunting of lion and cheetah populations has led to a decline in the food source population.
D
Lion and cheetah populations compete for the food source of zebras, and cheetahs outcompete lions.
22
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If the herbivore population in an ecosystem increased, what would most likely happen to the size of the carnivore population?

A
It would decrease.
B
It would increase.
C
It would die off.
D
It would remain the same.
23

A mountain lion population recently experienced a drop in population size. Which of the following would best describe the limiting factor that is involved?

A
A change occurred in the genetic variability.
B
The deer population experienced a rapid decline due to a parasite.
C
Mountain lion hunting experienced an increase in restrictions.
D
The population of Trichinella, a parasite, experienced a decline.
24

Which statement describes the relationship between plants, animals, and the carbon cycle?

A
Plants use carbon and release oxygen, and animals release carbon and use oxygen.
B
Animals fix carbon and release oxygen, and plants release carbon and use oxygen.
C
Animals fix carbon through respiration, and plants fix carbon through photosynthesis.
D
Plants use carbon when they decompose, and animals release carbon when they decompose.
25

Which determines carrying capacity?

A
logistic factors
B
exponential growth
C
population growth
D
limiting factors

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