Your secondary immune response can produce 100 times more antibodies than your primary immune response
a. true
b. false
Answer: a. true
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A white blood cell engulfing a bacterial cell would be an example of which of the following?
a. phagocytosis b. pinocytosis c. receptor-mediated endocytosis d. exocytosis
Recently the focus of research in behavioral ecology has been on the contribution by behavior to an animal's reproductive success. What is this called?
A. average number of mates B. fitness C. foraging efficiency D. longevity E. rate of growth to sexual maturity
Which of the following parts of angiosperms is
not a food source? a. roots. b. fruits. c. shoots. d. nectar. e. all of these are food sources
Which statement is false?
A) The ground tissue system of a leaf is called the mesophyll. B) Each vein in a leaf is composed of either xylem or phloem, but not both. C) The pith of a stem is often important in food storage. D) Tissues that are neither dermal nor vascular are known as the ground tissue system.