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
ANSWER: a
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Which of the following is not an example of symbiotic nitrogen fixation?
A. Anabaenea with a water fern B. Rhizobium with leguminous plants C. Azotobacter with certain photosynthetic protists D. Frankia with woody shrubs
Physical and chemical barriers that form the first line of innate defense include
A. the acidity of the stomach. B. tear fluid from the eye. C. an unpunctured skin. D. mucus and cilia of the respiratory tract. E. All of the answer choices are correct.
Four of the five answers listed below are types of
intercellular connections. Select the exception. a. tight junctions b. gap junctions c. plasmodesmata d. adhering junctions e. plasmalemma
Which is the more correct view of communities?
A) Gleason's individualistic concept B) Clement's organismal concept C) It depends upon the perspective. D) Both views were completely wrong.