Which one of the following is NOT considered to be one of the macronutrients needed by plants?
A. manganese
B. sulfur
C. phosphorus
D. nitrogen
E. potassium
A. manganese
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Enzymes aid in metabolism by ____
a. changing the DG of the reaction b. adding additional reactants to the system c. slowing the rate of some reactions and increasing the rate of other reactions d. stabilizing the transition state e. removing unused reactants from the system
What is misleading about commercials that show "scientific proof" that laundry detergent X is better than another leading brand?
A) We are shown only one tee-shirt becoming whiter in each detergent, not 20 tee-shirts in each detergent. B) We do not know whether the same amount of each detergent was used for washing. C) We do not know if everything besides the detergents was the same (machine used, type of stains, etc.). D) All of the above are aspects that are misleading.
Many cases of pediatric thyroid cancer occurred after the 1986 Chernobyl nuclear accident in Ukraine and the cause was traced to milk containing iodine-131
Which of these might be the most effective method to prevent thyroid cancer increase following exposure to excessive radiation? A) Do not allow anyone to drink any milk. B) Give dairy cows large doses of iodine. C) Give humans large doses of iodine before exposure. D) Give people large doses of iodine a few days following exposure.
__________________ isolating mechanisms include hybrid mortality and hybrid infertility.
a) Postzygotic b) Sympatric c) Prezygotic d) Barrier e) Environmental