The following are characteristics of Chlamydias except:
A. gram negative
B. obligate parasites that need host cells for growth
C. elementary bodies are the infectious form
D. elementary bodies lack enzyme systems for making ATP
E. reticulate bodies differentiate into elementary bodies
Answer: D. elementary bodies lack enzyme systems for making ATP
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How is the wavelength of light measured?
a. the distance between the crest and the trough of a wave b. the distance between two consecutive waves divided by two c. the distance between consecutive crest points of a wave d. the distance the wave travels in a given time period.
The most important predator in salt marshes at low tide are: a. crabs
b. birds. c. nematodes. d. marsh snails.
The principle of nuclear equivalence states that:a
developing cells become specialized to carry out specific functions. b. developing cells follow particular differentiation pathways. c. there is no loss of genetic information through determination or differentiation. d. differential gene expression is responsible for variation among cells. e. nuclear changes can take place during the entire life of an individual.
Knowing the atomic number for an element is very useful because
A. It tells us the number of protons, and thus the element B. It can be used to determine the number of neutrons C. It can be used to determine the number of electrons d. All of the above