Which of the following environmental conditions is likely to enhance photorespiration?
A. a ratio of CO2 to O2 that favors CO2
B. conditions that cause the stomata to open
C. plants growing far apart
D. a hot, dry environment
E. darkness
D. a hot, dry environment
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Gas exchange in mammalian lungs occurs in the
a. villi b. anterior air sacs c. posterior air sacs d. bronchioles e. alveoli
Which of the following is absolutely necessary for diffusion to occur?
a. a phospholipid bilayer b. a living cell c. a selectively permeable membrane d. a concentration gradient
The group of hominids living in the colder climates of Europe who had larger brains than modern humans
A) founder effect
B) Homo Habilis
C) Latin binomial
D) Australopithecus Africanus
E) convergent evolution
F) Ardipithecus ramidus
G) Neanderthals
H) chimpanzees
I) Homo erectus
J) astragalus
Both red blood cells and white blood cells
A. have a nucleus. B. have mitochondria and other organelles. C. have hemoglobin. D. can carry carbon dioxide in the blood. E. are derived from the same original stem cell.