Which of the following is true for ALL exergonic reactions?
A. The products have more total energy than the reactants.
B. The reaction proceeds with a net release of free energy.
C. Some reactants will be converted to products.
D. A net input of energy from the surroundings is required for the reactions to proceed.
E. The reactions are nonspontaneous.
B. The reaction proceeds with a net release of free energy.
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Which is not a unique adaptation of sea snakes for marine life?
a. nostrils high on the head b. reduced or absent scales c. laterally compressed tail d. loss of limbs
Polar covalent bonds form when
A) more than one pair of electrons is shared. B) an acid and a base are combined. C) ions are formed. D) electrons are shared unequally between atoms. E) atoms from two molecules are repelling each other.
Many plants devote significant resources to growing colorful, fragrant flowers filled with nectar. What does this illustrate the importance of?
A. nutrient storage in seeds B. long-term nutrient storage in perennial plants C. outcrossing D. chemical signaling among plants
The plasma membranes of root hair cells contain a variety of protein transport channels through which specific ions are transported, even against large concentration gradients, by
A. electron pumps. B. carbohydrate pumps. C. root pumps. D. proton pumps. E. water pumps.