This phylum of vascular, seed-bearing plants has over 260,000 known living species, and is the
dominant group of land plants today.
a. Cycadophyta
b. Anthophyta
c. Gnetophyta
d. Coniferophyta
e. Ginkgophyta
B
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The most oxygenated blood is indicated by the letter ____
a. A b. B c. C d. D e. E
Figure 31.14
The bracket indicated by the letter "A" in the accompanying figure is ____.
A. the epidermis B. a sweat gland C. the dermis D. the hypodermis E. a hair follicle
The survival functions for Ensatina eschscholtzii xanthoptica and Ensatina eschscholtzii oregonensis were determined when both newt subspecies were exposed to western scrub-jays that had previous experience with the toxic mimic of E. e. xanthoptica
How would the survival functions differ if the scrub-jays had had no previous experience with the toxic mod-el? a. The survival functions would not differ between the two newts. b. E. e. oregonensis would have higher survival than E. e. xanthoptica. c. The survival of E. e. xanthoptica would be even greater when compared with that of E. e. ore-gonensis. d. The lack of experience in scrub-jays would not have any influence. e. e. oregonensis would have higher survival than E. e. xanthoptica.
How much of your DNA is identical to the person who sits next to you in biology class?
A. 1% B. 50% C. 90% D. 99.9% E. 99%