The type of tissue lining ducts and breathing passageways of the lungs is __________
a. epithelial
b. muscle
c. nervous
d. connective
A
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Parts of the choroid form
(a) the lens. (b) the ciliary body. (c) the iris. (d) both b and c.
Which layer of the extracellular matrix of a plant provides the greatest strength?
A. the middle lamella B. the primary cell wall C. the secondary cell wall D. the plasma membrane
Imagine that a coyote tobacco plant is being eaten by M. sexta caterpillars. In response to these specific herbivores, the tobacco produces volatile chemicals that can travel through the air. Why?
A. to signal to other tobacco plants that caterpillars are in the area B. to produce an odor that will deter other caterpillars from eating its leaves C. to attract insect predators that will eat the caterpillars D. to signal to other parts of the plant to produce more nicotine
The Mesozoic era is often called the age of:
a. amphibians. b. fish. c. mammals. d. conifers. e. reptiles