Copper (Cu) is considered a micronutrient.
Answer the following statement true (T) or false (F)
True
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In the classic fable of "the boy who cried wolf," the villagers who stopped listening to the shepherd boy who kept lying and telling them that a wolf was attacking the sheep were exhibiting the form of learning called ____
Fill in the blank with the appropriate word.
When a car burns gasoline, much of the energy is released in the form of heat. Which of the following best describes this process in relation to the first law of thermodynamics?
A. Energy is conserved. B. Energy is always used up in reactions. C. All energy comes from the sun. D. Energy can be changed from one form to another. E. Energy is often destroyed.
The growth factor RGF stimulates proliferation of cultured rat cells. The receptor that binds RGF is a receptor tyrosine kinase called RGFR. Which of the following types of alteration would be most likely to prevent receptor dimerization?
(a) a mutation that increases the affinity of RGFR for RGF (b) a mutation that prevents RGFR from binding to RGF (c) changing the tyrosines that are normally phosphorylated on RGFR dimerization to alanines (d) changing the tyrosines that are normally phosphorylated on RGFR dimerization to glutamic acid
Why is energy lost when herbivores eat primary producers?
A) Primary producers have energy stored in indigestible substances. B) Primary producers cannot produce once eaten. C) Digestion takes place so rapidly that very little energy is absorbed. D) Most primary producers contain no usable energy for herbivores.