The community of detritivores, such as earthworms, millipedes, slugs, and pseudoscorpions, living in the leaf litter on the shady floor of a deciduous forest obtains its energy and nutrients primarily from
A) decomposition of the leaves of deciduous trees that fall on the surface of the soil.
B) chemosynthesis by green and purple sulfur bacteria living on the surface of the leaves.
C) photosynthesis or algae living in the soil beneath the leaves.
D) carbohydrates formed in the roots of the trees that leach out into the surrounding soil.
E) predation on one another.
A
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Refer to the figure. At the beginning of the experiment,
A) side A is hypertonic to side B. B) side A is hypotonic to side B. C) side A is isotonic to side B. D) side A is hypertonic to side B with respect to glucose. E) side A is hypotonic to side B with respect to NaCl.
Embryonic stem cells are pluripotent, able to ____
a. divide an unlimited amount of times b. give rise to most, but not all body cell types c. give rise to any of the body cell types d. divide a limited amount of times e. give rise to different, unique individuals
In phototropism, shoots respond to ____ light
a. red b. green c. yellow
d. blue e. ultra-violet
Which of the following junctions is most abundant in tissues such as skin that are required to resist significant mechanical stress?
A) gap junctions B) desmosomes C) focal adhesions D) tight junctions E) All are abundant in tissues resisting stress.