Which of the following is an important mineral ion of the cytochrome pigments used in cellular respiration?
A. potassium
B. iron
C. calcium
D. magnesium
E. zinc
Answer: B
Biology & Microbiology
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All of the following occur in a countercurrent exchange EXCEPT
a. flow in opposite directions. b. a concentration gradient. c. a large surface area. d. short contact time for exchange
Biology & Microbiology
Reefs that are separated by a lagoon from the land mass they surround are called:
a. atolls. b. fringing reefs. c. barrier reefs. d. patch reefs. e. table reefs.
Biology & Microbiology
The tortoiseshell pattern on a cat
A) usually occurs in males. B) is the result of a homozygous recessive condition. C) results from X chromosome inactivation. D) is a result of alleles on the Y chromosome.
Biology & Microbiology
Light microscopy can be used to visualise all of the following except:
a. protozoa b. viruses c. fungi d. bacteria
Biology & Microbiology