Which of the following is a correct difference between active transport and facilitated diffusion?
-active transport can move solutes in either direction across a membrane, but facilitated diffusion can only move in one direction.
-active transport involves transport proteins, and facilitated diffusion does not.
-facilitated diffusion can move solutes against a concentration gradient, and active transport cannot.
-facilitated diffusion involves transport proteins, and active transport does not.
-active transport requires energy from atp, and facilitated diffusion does not.

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

What is turgor pressure, what causes it, and what does it do for a plant?

Which term most precisely describes the cellular process of breaking down large molecules into smaller ones? a) catalysis b) metabolism c) anabolism d) dehydration e) catabolism