Currently, there are bald eagles living in _____ states
a. 28
b. 48
c. 49
d. 50
C
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What is the main role of T cells in the immune response?
A. To recognize sites of infection B. To stimulate the production of immune cells C. To secrete antibodies D. To trigger clonal selection
Which of the following is(are) fixed action
pattern(s)? a. A baby garter snake captures and eats a slug. b. A chick’s gaping mouth induces a feeding response in a parent bird. c. A European cuckoo hatchling pushes the host bird's egg out of the nest. d. A male fruit fly waves his wings at a female fruit fly during courtship. e. All of these are fixed action patterns
The epithelial cells lining the intestine have surface projections that increase the area for absorption. These projections are called ________
A) villi B) mucus C) microvilli D) bile
Membrane synthesis in the cell requires the regulation of growth for both halves of the bilayer and the selective retention of certain types of lipids on one side or the other. Which group of enzymes accomplishes both of these tasks?
(a) flippases (b) phospholipases (c) convertases (d) glycosylases