Answer the following statements true (T) or false (F)
1. Zooplankton are heterotrophs.
2. Biomass is always highest at the lower trophic levels.
3. Most of the Earth's phosphorus is trapped in sedimentary rocks.
4. Assimilation is the process by which inorganic substances are incorporated into organic molecules.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
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The gastrointestinal microbiota has been implicated in the development of
A. appropriate immune responses to microbial antigens. B. dental plaque. C. non-infectious diseases like obesity. D. All of the responses are correct.
Which of the following sources of energy
powers the light-independent reactions of photosynthesis?
a. light b. ATP and NADPH c. photosystem 2 d. glucose e. NADP+
Four of the five choices listed below are members
of the same group. Select the exception. a. archaeans b. amoebozoans c. diatoms d. dinoflagellates e. euglenoids
Stomach motility
a. decreases following a heavy meal. b. controls the amount of material leaving the pyloric sphincter. c. is unaffected by emotional state or external environmental factors. d. may be retarded when stretch receptors on the stomach wall are activated. e. is increased by hormones released in response to high stomach acidity.