The bacterium E. coli
a. is a normal inhabitant of the mammalian
gut.
b. has some mutant strains that produce toxins
and cause disease.
c. is grown in laboratories around the world.
d. produces vitamin K.
e. has all of these characteristics
E
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A friend of yours calls to say that his car would not start this morning. He asks for your help. You say that you think the battery must be dead. If so, then jump-starting the car from a good battery will solve the problem. In doing so, you are _____
A) testing a theory for why the car will not start B) making observations to inspire a theory for why the car will not start C) stating a hypothesis and using that hypothesis to make a testable prediction D) comparing multiple hypotheses for why the car will not start
A pathogen is
(a) a disease. (b) an organism that causes a disease. (c) a substance that kills bacteria. (d) the same as a heterocyst.
When does pattern formation begin?
a. At the moment of fertilization b. Once the zygote has divided several times. c. As maternal mRNAs are delivered to opposite ends of an unfertilized egg as it forms. d. When the maternal mRNAs are delivered to the opposite ends of the egg. e. Once the zygote has implanted on he uterine lining.
The enzyme lactase splits the lactose molecule into ____________ and ____________. Fill in the blank(s) with the appropriate word(s)