Essential plant nutrients include carbon, potassium, calcium, and nitrogen.
Answer the following statement true (T) or false (F)
True
It is true that essential plant nutrients include carbon, potassium, calcium, and nitrogen.
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The primary reason for the daylight migration of many pelagic animals to deeper waters is:
a. escape from visual predators. b. escape from the harmful effects of the sun. c. preference for the colder waters of the deep. d. the abundance of food in deeper waters.
Four of the five answers listed below are functions of the nephron. Select the exception
a. filtration b. dilution c. excretion d. reabsorption e. secretion
Which of the following is required for amplification of DNA by cloning but not for PCR?
A: A vector B: DNA polymerase C: Nucleotides D: All of the above
Which of the following statements concerning enzymes is false?
A) They can carry out hundreds of chemical transformations per second. B) Many activities in living organisms require multiple enzymes. C) One enzyme will work on many different substrate molecules to produce many different products. D) They accelerate the rate of chemical reactions.