The photosynthetic production of one molecule of glucose requires ________ molecule(s) of ATP.
A. 24
B. 12
C. 18
D. 6
Answer: C
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The approximate BOD value for raw sewage is
A. 2000-7000 milligrams per milliliter. B. 500-800 grams per milliliter. C. 0-50 kilograms per milliliter. D. 300-400 milligrams per liter.
Which of the following correctly describes the fate of the embryonic germ layers?
A. The endoderm forms the gut, the ectoderm forms the epidermis and parts of the nervous system, and the mesoderm forms muscles and most internal organs. B. The endoderm forms the gut, the ectoderm forms the reproductive tract and endocrine system, and the mesoderm forms muscles and most internal organs. C. The endoderm forms the inner part of all internal organs, the mesoderm forms the middle parts, and the ectoderm forms the outer coverings. D. The layers are sequential structures that all disappear during development, with the endoderm appearing first and then is replaced by the mesoderm, which in turn is supplanted by the ectoderm. E. The endoderm is an embryonic structure that disappears early, whereas the ectoderm persists as the skin and the mesoderm as the internal organs.
Habitat fragmentation can reduce biodiversity by
a. creating patches too small to maintain optimal breeding conditions. b. increasing the effects of chemical pollution. c. eliminating vast tracts of forests. d. introducing exotic species into a habitat. e. doing all of these.
Rods and cones, like most sensory receptors, depolarize open receiving a stimulus.
Answer the following statement true (T) or false (F)