Which of the following statements is true?

a. Viruses cannot reproduce outside a host cell.
b. Bacteria cannot move.
c. Fungi are plants.
d. Protozoa have rigid cell walls.
e. Algae are parasites.


Ans: a. Viruses cannot reproduce outside a host cell.

Biology & Microbiology

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Indicate whether the statement is true or false

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The type of neuron that conducts its message from the central nervous system toward an effector is the

A. synaptic neuron. B. interneuron. C. motor neuron. D. sensory neuron. E. Schwann cell.

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Which of the following factors is LEAST likely to attract pollinators to a flower?

A. color of the flower in UV light B. the amount of nectar C. taste of the ovules D. color of the flower in visible light E. odor

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The majority of crustaceans live in ____.

A. bodies of freshwater B. tropical rain forests C. marine habitats D. wetlands E. grasslands

Biology & Microbiology