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GaryK [48]
3 years ago
7

Which of the following statements about viruses is false?

Biology
1 answer:
Sedaia [141]3 years ago
5 0

Answer:

C) They are very small uni-cellular microorganisms.

Explanation:

Microorganisms are very small organisms which are not visible to naked eyes. They include bacteria, some protists, some fungi etc. Viruses are also very small pathogens which can infect all types of living organisms, from plants to animals to bacteria.

Viruses are traditionally not considered microorganisms because they behave like non living entities outside the host cell. They do not have a proper cellular structure. Most of them just have genetic material enclosed in a protein shell. They do not even perform normal metabolic functions like replication outside the hosts's body. Hence, they are not considered microorganisms.

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Which environmental factor could lead to a decrease in genetic variation in a population of tuna?
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The environmental factor that could lead to a decrease in genetic variation in a tuna population is an increase in pollution (second option).

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There is a correlation between genetic variability and environmental pollution, the latter being a factor that impacts negatively on the variability of a specific population.

The concept of pollution stress not only implies a low rate of reproduction, but it is also a factor that prevents genetic exchange with other populations, which is a factor that makes the genetic variability decrease in a population.

For these reasons an increase in pollution implies a decrease in genetic variability in a tuna population.

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