The density of a population is defined as the ____
a. number of individuals in a population at a specified time
b. number of individuals in a population at a specified place
c. number of individuals per unit area or per unit volume of habitat
d. size of the individual organisms per unit area
e. number of individual organisms per family unit
ANSWER: c
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____detect changes in pressure and convert this stimulus energy into ____
a. Thermoreceptors; action potentials b. Mechanoreceptors; action potentials c. Chemoreceptors; resting potentials d. Photoreceptors; resting potentials e. Osmoreceptors; threshold potentials
Okazaki fragments are found in the leading strand of DNA
__________________ Indicate whether the statement is true or false.
In most animals, digestion occurs
A) intracellularly, through collar cells. B) extracellularly, within the circulatory system. C) intracellularly, through simple absorption. D) extracellularly, within a cavity that is open at both ends. E) extracellularly, within a gastrovascular cavity.
Ovarian cancer has a poor prognosis primarily because..
A) the ovaries are inaccessible. B) nonspecific or no signs appear until after secondary tumors develop. C) the same tumor markers are present with many types of cancer. D) no effective treatment is available.