Which of the following enables corals to grow in shallow waters?
a. mutualistic relationships with protists
b. nutritionally rich water and silt
c. high levels of ocean acidity
d. calcium-rich plankton
a. mutualistic relationships with protists
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A fungal reproductive structure that contains all of the products of a single meiotic division is called the ascus
Indicate whether the statement is true or false
The Ti plasmid has been genetically engineered to improve its utility as a cloning vector by all of the following EXCEPT
A. nonessential regions, including tumor-inducing genes, have been deleted. B. elements found in other vectors, such as selectable markers and multicloning sites have been added. C. genes responsible for resisting infection with B. thuringiensis have been added. D. genes required for the actual infection of the plant cell by the plasmid are retained.
Decompression sickness ("the bends") is caused by
a. a rapid rise of carbon dioxide in the blood. b. lack of oxygen in the tissues. c. bubbles of nitrogen in the blood. d. glucose deficiency. e. descending too rapidly into deep water.
Which of the following is a common childhood parasite in the United States?
A) Taenia solium B) Enterobius vermicularis C) Entamoeba histolytica D) Cryptosporidium parvum E) Giardia intestinalis