What do you know about half life? How does it relate to the question?
What will be an ideal response?
The first step is to figure out how many half-lives have occurred. 22,800 ? 5,700 = 4.
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Gas exchange occurs where?
a. trachea b. pharynx c. alveoli d. bronchi
Which of the following is the most important in order for organisms to facilitate social behavior?
a. There must be a large population. b. All present must be of the same species. c. All present must have the same genetic imprinting. d. There must be a mechanism for communication. e. No outsiders can be allowed to enter the group.
The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called
A. active transport. B. diffusion. C. facilitated diffusion. D. endocytosis. E. osmosis.
A glycerol molecule binds to three fatty acid chains to form a _______________.
Fill in the blank(s) with the appropriate word(s).