The International Tundra Experiment provides evidence that
A) the Arctic has risen in temperature by 1-3°C.
B) species diversity will increase in the Arctic due to climate change.
C) shrubs in the Arctic will have decreased height due to climate change.
D) there will be less cover by lichens and mosses due to climate change.
D
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Dendritic cells are phagocytes with antigen-presenting properties
Indicate whether the statement is true or false.
Which of the following is an example of an error in chromosome number?
a. inversion b. deletion c. trisomy d. duplication
All of the following are true of the process of
phosphorylation EXCEPT that a. a molecule gains a phosphate group. b. a molecule loses a phosphate group. c. molecules become less stable. d. it is used to prime molecules to react. e. it produces ADP from ATP.
Nitrogen is a growth-limiting nutrient for many organisms because
A) it is necessary for the biosynthesis of amino acids. B) it is required for synthesis of nucleotides. C) it is required for lipid synthesis. D) only a small number of bacteria are able to extract it from the atmosphere. E) only a few microbes can extract it from the atmosphere, but all organisms require it for amino acid and nucleotide synthesis.