The archeological record indicates when people began using various grains and legumes and when these food plants were domesticated
Looking at the figure below, estimate how long humans have been selectively breeding grains. (Note that the gaps in the figure represent periods when no evidence of the crop indicated was found.)
What will be an ideal response?
ANS:
Students may give individual times for each grain and legume listed or may use the rough average of over 10,000 years.
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Which of the following is the correct order of the stages of meiosis?
a. prophase I, metaphase I, anaphase I, telophase I, cytokinesis, prophase II, metaphase II, anaphase II, telophase II, cytokinesis b. prophase I, prometaphase I, metaphase I, anaphase I, telophase I, cytokinesis, prophase II, prometaphase II, metaphase II, anaphase II, telophase II, cytokinesis c. prophase I, metaphase I, prometaphase I, anaphase I, telophase I, prophase II, prometaphase II, metaphase II, anaphase II, telophase II, cytokinesis d. prophase I, metaphase I, prometaphase I, anaphase I, telophase I, prophase II, metaphase II, prometaphase II, anaphase II, telophase II, cytokinesis
Cats cannot synthesize the amino acid taurine. This means that in cats, taurine
A. is an essential amino acid. B. must be stored in cellular compartments. C. is not present in their normal diet. D. is not a required nutrient.
The emergency treatment for anaphylactic shock is an injection of
a. glucose. b. epinephrine. c. serotonin. d. dopamine. e. histamine.
The pancreatic secretions governing glucose levels are precisely controlled by
a. neural connections to the pancreas. b. the blood-brain barrier. c. cooperative interactions. d. homeostatic feedback loops. e. releasing factors.