Members of the genus Veillonella are part of the normal microflora of the
A. mouth.
B. upper and lower respiratory tract.
C. sweat glands and hair follicles.
D. stomach.
Answer: A
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Some microbial proteins are spliced after translation in a reaction that results in removal of one or more internal intervening sequences called exteins.
Answer the following statement true (T) or false (F)
The systematics of today is very different than the systematics learned a generation ago. As a result,
which of the following statements do we know to be entirely inaccurate?
a. the biological species concept has no validity b. the number of existing species is known with certainty c. the Linnaean system of classification is wrong most of the time d. morphological traits are not reliable for determining species relationships e. evolutionary based classification has entirely re-organized the classification and categories of organisms and their relationships to one another.
Reproductive isolating mechanisms typically evolve
after gene flow __________. Fill in the blank(s) with the appropriate word(s).
Which of the following statements about mitochondria is false?
A) Because of the role of the mitochondria in producing cellular energy, mitochondrial diseases often affect the muscles and nervous system. B) Because mitochondria are present in the cytoplasm, mitochondrial diseases are transmitted maternally. C) Like nuclear genes, mitochondrial genes usually follow Mendelian patterns of inheritance. D) Mitochondria contain circular DNA molecules that code for proteins and RNAs. E) Many mitochondrial genes encode proteins that play roles in the electron transport chain and ATP synthesis