Salvarsan was a drug to treat syphilis developed by
a) Ehrlich.
b) Fleming.
c) Weizmann.
d) Needham.
Answer: a) Ehrlich.
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Crenarchaeotes whose optimal growth temperature is over 80 °C are called
A) hyperthermophiles. B) thermophiles. C) extreme halophiles. D) halophiles.
We know that that there are over 50 major phyla in Bacteria; however, only about 25 of these phyla have cultured representatives. Why is this?
How are scientists attempting to culture representative from the 25 phyla that do not currently have any organisms in culture? What will be an ideal response?
Whole-cell movements involve the coordinated activity of ____
a. microtubules only b. microfilaments only c. blastomeres only d. microtubules and microfilaments e. microtubules, microfilaments and blastomeres
Sharks
Select one: a. have bone skeletons. b. lack jaws. c. have a keen sense of smell. d. lack the lateral line system of bony fishes. e. do not have paired fins.