Answer the following questions true (T) or false (F)

1. Diffusion occurs because of random molecular movement.

2. A cell wall stops a plant cell from taking in so much water that it will burst.

3. A substance moving down the concentration gradient is an example of active transport.


1. TRUE
2. TRUE
3. FALSE

Biology & Microbiology

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Burkholderia cepacia and Pseudomonas aeruginosa can be a particular problem with ________.

A. myasthenia gravis patients B. decay of iron pipes under anaerobic conditions C. pneumonia patients D. cystic fibrosis patients

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Describe the second phase of the growth of the human population

What will be an ideal response?

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All of the following are criteria by which a species may be defined EXCEPT

A. the ability to reproduce. B. possession of a shared gene pool. C. ability to hybridize through interbreeding. D. reproductive isolation. E. the ability to produce fertile offspring.

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Substances that are naturally produced by a certain microorganism are called

A. Antibiotics B. Narrow-spectrum drugs C. Semisynthetic drugs D. Synthetic drugs E. Broad-spectrum drugs

Biology & Microbiology