Scientists often study lichens to look at the effects of acid rain. Why?
a. Lichens absorb water directly from air.
b. Lichens are located in many diverse environments.
c. Lichens can withstand droughts.
d. Lichens get water from the area directly beneath trees.
A
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To maintain their current weight, a person must balance their caloric intake with the ____
a. amount of energy stored in fat b. amount of vitamins and minerals in their diet c. amount of energy provided in their daily diet d. energy expended in their daily activities e. amount of saturated fats in their diet
At term, ____________________ changes initiate and drive the events surrounding birth Fill in the blank(s) with the appropriate word(s)
Lyme disease is transmitted by ________.
A. fleas B. ticks C. flies D. lice E. droplets
What is meant by the term cotransformation?
A) An F? cell can become F+ several times in a life cycle. B) Cotransformation occurs when several linked genes are transformed simultaneously. C) Several pieces of DNA can form heteroduplexes in a cell. D) More than one phage infects a bacterial cell. E) A cell can pick up more than one F factor.