Pulmonary veins carry ____
a. oxygen-rich blood back to the heart
b. oxygen-poor blood back to the heart
c. oxygen-rich blood away from the heart
d. oxygen-poor blood away from the heart
e. oxygen-rich blood to and from the heart
ANSWER: a
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10. One of the two major distinguishing characteristics of mollusks is
(a) the presence of three body regions. (b) the mantle. (c) segmentation of the body. (d) jointed appendages.
There are two cellular domains: the ____________________ and the ____________________
Fill in the blank(s) with correct word
A population of plants experiences several years of severe drought. Much of the population dies due to lack of water, but a few individuals survive
You set out to discover the physiological basis for their adaptation to such an extreme environmental change. You hypothesize that the survivors have the ability to synthesize higher levels of _____ than their siblings do. A) auxin B) gibberellin C) cytokinin D) abscisic acid
Figure 31.4
Answer the following question with reference to the above figure of epithelial tissues.
Which tissue lines blood vessels and the air sacs of lungs?
A. A B. B C. C