Which of the following elements are cycled, due in part to the actions of archaeons and bacteria?
A. carbon
B. sulfur
C. nitrogen
D. All of these elements are cycled.
D
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Which of the following is NOT true concerning
Pangaea? a. It formed during the Permian. b. Gymnosperms flourished on Pangaea c. It caused climates to become warmer and wetter. d. It began to break apart during the Jurassic. e. Plant diversity expanded on its isolated fragments during and after the Jurassic.
Which stimuli most directly causes the Venus flytrap to catch an insect?
a. gravity b. light c. touch d. scent e. sound
Which statement about genetics is true?
A) Genes are proteins that produce DNA. B) DNA is made up of six different kinds of nucleotides. C) Differences among organisms reflect different nucleotide sequences in their DNA. D) Each DNA molecule is a single strand of nucleotides.
A mutant protist is found in which some mitochondria lack an inner mitochondrial membrane. Which of the following pathways would be completely disrupted in these mitochondria?
A) biosynthesis B) oxidative phosphorylation C) the citric acid cycle D) glycolysis E) alcoholic fermentation