Which one of the following statements about cerebrospinal fluid (CSF) specimens is false?
A) They are collected only by physicians.
B) They are treated as STAT (emergency) specimens in the laboratory.
C) They should always be refrigerated.
D) They should be rushed to the laboratory after collection.
C) They should always be refrigerated.
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A tidal pattern of two equal high and low tides per day is called a:
a. mixed semidiurnal tide. b. semidiurnal tide. c. diurnal tide. d. spring tide. e. neap tide.
Where is heterochromatin not commonly located?
A. telomeres B. centromeres C. silenced X chromosomes D. gene-poor regions of chromosomes E. chromosomal regions carrying genes that encode ribosomal proteins
You notice that in your aquarium, previously full of undoubtedly male fish, one is laying eggs. Upon a bit of research, you find out that the species of fish you purchased is a sequential hermaphrodite. Which of the following is true?
A. One of the male fish fertilized its own eggs. B. Since the fish are hermaphrodites, one of the male fish laid eggs and another will likely fertilize them. C. One of the male fish underwent protandry and became a female. D. The fish have protogyny, which allows the males to lay eggs. E. The fish have parthenogenesis, therefore their eggs do not have to be fertilized to be viable.
In mitochondria, an electron transport chain pumps protons from the matrix into the intermembrane space, whereas in chloroplasts, an electron transport chain pumps protons from the ________.
a. the stroma into the cytosol. b. the stroma into the thylakoid space. c. the matrix into the stroma. d. the thylakoid space to into the stroma. e. the intermembrane space into the stroma.