Even though nitrogen constitutes 78% of Earth's atmosphere, the amount available for living things nearly all comes from
A. a few groups of nitrogen-fixing bacteria.
B. the breakdown of minerals.
C. a few genera of detritivores.
D. the breakdown of dead plants.
E. nitrogen-containing fertilizers.
A. a few groups of nitrogen-fixing bacteria.
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Given the following pedigree, what is the coefficient of inbreeding for individual IV-1?
A) 1/2 B) 1/4 C) 1/8 D) 1/16 E) 1/64
The film of fluid in the pleural cavity functions to:
a. nourish the lungs. b. rehydrate the lungs. c. provide lubrication between the lungs and thoracic wall. d. trap bacteria that may enter the lungs. e. inflate the lungs.
Which of the following is necessary for an atom to participate in the formation of a double covalent bond?
A) The participating atoms must have a full outer shell. B) There has to be a difference in electronegativity between it and the atom with which it forms the double covalent bond. C) The participating atoms must be from the same row in the periodic table. D) The participating atoms must have two or more unpaired electrons.
examples of Analogous structures
What will be an ideal response?