Most bacteria are encased by a strong..
What will be an ideal response?
Cell wall
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Which of the following statements about coral bleaching is true?
A. All of the answer options are true. B. Bleached corals die more rapidly than unbleached corals. C. Coral bleaching results from the loss of algal symbionts from the coral tissue. D. Corals appear white after bleaching because their white calcium carbonate skeletons are visible through their translucent tissue. E. Increased seawater temperature is one cause of coral bleaching.
Which of the following areas of the human body is(are) not normally free of microorganisms?
A. Intestinal tract B. Eyes C. Respiratory tract D. All of the choices are correct.
What effect does atrazine have on frogs?
a. it alters their sexual development b. it causes them to grow extra limbs c. it increases their sex drive d. it causes blindness e. it causes more than one of these
Drosophila melanogaster is a/an __________. This type of animal is the most abundant of all animal species, making it an appropriate choice as an experimental model
(a) insect (b) bird (c) amphibian (d) mammal