Any type of stimulus can alter resting potential by increasing the permeability of the membrane to:
a. potassium.
b. sodium.
c. calcium.
d. neurotransmitters.
e. enkephalins
B
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Several species of sea urchins may inhabit the same tide pool and their reproductive periods overlap. Although they practice external fertilization, they seldom interbreed because eggs produce chemicals that are only attractive to sperm of their own species. This is an example of a _________ barrier that _______________.
A. prezygotic; causes geographic isolation B. prezygotic; causes temporal isolation C. prezygotic; prevents gamete fusion D. postzygotic; prevents zygote fusion E. postzygotic; causes hybrid infertility
A plant sustains pathogen-induced damage to one of its cell walls. A gene-for-gene response soon follows and the tissue surrounding the injury soon dies. Which signaling molecules facilitated this response?
A. Oligosaccharins B. Ethylene C. Gibberellins D. Auxins E. Abscisic acid Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about injury response in plants? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
During which phase of photosynthesis is ATP and NADPH synthesized?
a. glycolysis b. citric acid cycle c. light-dependent phase d. light-independent phase e. carbon fixation reactions
_________ can be used to disinfect water, food, and surfaces.
A) Chlorine compounds B) Phenols C) Alcohols D) Hydrogen peroxide