The guard cells surrounding each stoma close the stomata periodically to

1. carry out cellular respiration
2. prevent water loss
3. conduct photosynthesis
4. absorb nutrients


Answer: Prevent water loss.

Biology & Microbiology

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When an enveloped virus adsorbs to the host cell with its protein spikes, the virions are taken into the cell by the process of

A. penetration. B. production. C. fusion. D. endocytosis.

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Cells produce RNA by the process of transcription and proteins by the process of translation.

a. true b. false

Biology & Microbiology

Based on the data in the accompanying figure, an infant with 90% survival (or 10% death) would weigh:a

11 lbs. b. 9 lbs.

c. 7 lbs. d. 5 lbs. e. 3 lbs.

Biology & Microbiology

A strain of Neisseria gonorrhea has a mutation which has caused it to lose the ability to produce fimbriae and become less virulent as a consequence. What function has this pathogen lost?

A) the ability to adhere to cells of the body B) the ability to move from one location in the body to another C) the ability to produce an endotoxin D) the ability to establish a latent infection E) the ability to prevent phagocytes killing it

Biology & Microbiology