It has been estimated that 70% of human and animal food ________ comes from seed endosperm of grain crops.
A. carbohydrate
B. fat
C. vitamins
D. protein
E. minerals
D. protein
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The first evidence of a connection between genes and metabolism came from studies of alkaptonuria
conducted by ____.
a. Beadle and Tatum b. Griffith c. Watson and Crick d. Garrod e. Nirenberg and Leder
A buffer system guards against changes in ________
a. all of the choices b. salinity c. pH d. temperature
The kidneys are both protected and held in place by cushions of fat. In cases of rapid weight loss, the kidneys may drop to a lower position, possibly causing kinks in a nearby tubular organ. If this happens, urine will back up into the kidneys, severely damaging them. What organ(s) is/are most-likely kinked in this situation?
A. urethra B. renal arteries C. ureters D. renal veins E. nephrons Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about urine flow from the kidney? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In a reflex arc, the correct sequence of cell types through which an electrical signal would pass would be
A. motor neuron ? sensory neuron ? interneuron in the PNS B. sensory neuron ? motor neuron ? interneuron in the CNS C. sensory neuron ? interneuron in the CNS ? motor neuron D. motor neuron ? interneuron in the PNS ? sensory neuron