You have started your experiment with two populations that are genetically identical. What process will introduce genetic variation into these populations? Will identical genetic changes occur in each flask?
What will be an ideal response?
Answers will vary.
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Diffusion of respiratory gases is enhanced by ____
a. a large surface area b. a thick epithelial layer c. cool temperatures d. the presence of active transport pumps e. the presence of carbon dioxide
Action potentials never vary in magnitude along a particular excitable membrane
Indicate whether the statement is true or false.
Which of the following is a function of the membrane proteins called channel proteins?
a. They serve as anchors or stabilizers for the cell membrane. b. They bind to specific extracellular molecules to trigger a cellular change. c. They regulate the passage of ions, bypassing the lipid portion of the cell membrane. d. They are enzymes. e. They are used as a source of energy.
Without the ____________ that photosynthesis produces, aerobic cellular respiration could not occur.
Fill in the blank(s) with the appropriate word(s).