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
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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
Describe the second phase of the growth of the human population
What will be an ideal response?
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.
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