The closing of a plant's stomata will
a) increase capillary action in the plant's stem.
b) increase transpiration pull.
c) cause wilting.
d) cause less water to be pulled up from the plant's roots.
Ans: d) cause less water to be pulled up from the plant's roots.
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The variables that investigators try to keep the same for both the experimental and the control groups are
(a) independent. (b) controlled. (c) dependent. (d) a and c.
True or false: Experiments generating simple molecules under conditions resembling that of early Earth demonstrate that the first cells are likely to be extremely similar to cells found today
A. true B. false
Match the following items with the correct phrases.
_______1. Infections that patients develop while hospitalized or within 14 days of hospital discharge are considered to be ____________________. _______2. Infections that patients have on hospital admission are considered to be ____________________. _______3. ____________________ may result if healthcare workers fail to wash their hands after handling laboratory animals or pets being used for pet therapy. _______4. Infections that are actually caused by healthcare workers are specifically known as ____________________. _______5. Each year, in the United States, approximately 2 million hospitalized patients develop ____________________. a. arthropodborne infections b. community-acquired infections c. iatrogenic infections d. nosocomial infections e. nosocomial zoonoses
How does DDT in the environment affect many birds?
A. stunted growth of chicks B. chronic liver failure in adults C. advancing neurological degeneration D. decreased reproductive rate