In photosynthesis, carbon fixation occurs:
A. in photosystem I
B. in the electron transport chain
C. in photosystem II
D. in the Calvin cycle
E. during photorespiration
D. in the Calvin cycle
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Archaeal flagella are superficially similar to bacterial flagella, although archaeal flagella are much thicker than bacterial flagella.
Answer the following statement true (T) or false (F)
If an atom has the atomic number 11 and the atomic mass 22.99, it will have
A. 1 electron in the third energy level. B. 1 electron in the second energy level. C. 3 electrons in the fourth energy level. D. 1 electron in the first energy level.
Lactose is a disaccharide of glucose and galactose, and its digestion requires the actions of the enzyme lactase
If lactose is eaten as part of the diet but is not digested by lactase, this sugar is then metabolized by bacteria in the intestine, leading to the symptoms of lactose intolerance. Lactose intolerance, therefore, results from a(n) A) lack of dehydration synthesis of lactose. B) inability of the body to produce lactose. C) low blood lactose level. D) lack of hydrolysis of lactose.
Bats use high ultrasonic sounds to perceive their environment much like humans use radar. In animals,
this process of detecting objects is called
a. sound reflection navigation. b. extra sensory perception. c. echolocation. d. ultralocation. e. auditory navigation.