While examining a hot spring, you find something you haven't seen before. It has a cell membrane, but the cell wall lacks peptidoglycan. It contains both DNA and RNA. The DNA is circular. It would be classified as a(n)
A) prion. B) archaea. C) fungus. D) bacterium. E) virus.
B
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Which of the following factors would also affect tree growth, and thus complicate the experiment described above?
A. the presence of other tree parasites B. the distribution of nutrients in each tree's local environment C. the amount of leaves, and thus photosynthetic production, of each of the trees D. the ambient light conditions, and thus photosynthetic production, for each of the trees E. All of responses above would also affect the growth of the trees, and thus complicate the experiment described above.
A fungus is recovered from a nail scrapping. Microscopic examination reveals numerous smooth, thin-walled, club-shaped, multiseptate macroconidia; however, microconidia are absent. The or-ganism can be identified as:
a. Microsporum canis. b. E. floccosum. c. T. rubrum. d. M. gypseum.
Which of the following protists may cause
dysentery after drinking contaminated water?
a. dinoflagellates b. apicomplexans c. amoebas d. ciliates e. water molds
The significance of oocyte polarity is that
a. cell systems near the anterior (head) end of an organism are aligned differently from cell systems at the posterior end. b. it results in the formation of the gray crescent. c. it produces differently pigmented regions in the egg. d. cytoplasmic substances located at one end of the zygote differ from cytoplasmic substances located at the other end. e. all of these are true.