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.

Biology & Microbiology

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Gas exchange occurs where?

a. trachea b. pharynx c. alveoli d. bronchi

Biology & Microbiology

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.

Biology & Microbiology

A glycerol molecule binds to three fatty acid chains to form a _______________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

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.

Biology & Microbiology