Due to a rapid change in the environment, a population of ants was reduced from one million to one thousand. What
type of genetic drift will occur in the gene pool of this population when it expands again?
a. gene flow
b. migration
c. natural selection
d. the founder effect
e. a genetic bottleneck
e
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What is the definition of endocytosis?
A. The transport of large molecules out of the cell. B. The entire plasma membrane turns itself inside out. C. The digestion of larger molecules that were brought into the cell. D. The transport of large molecules into the cell.
A nurse takes your blood pressure during your annual examination, and she enters a reading of 115/70 in your medical chart. These numbers mean that the
A. pressure in your brachial artery during ventricular contraction is 115, while the pressure during ventricular relaxation is 70. B. nurse heard sounds through the stethoscope only when the pressure in your brachial artery was exactly 115 and again when it was exactly 70. C. pressure in the ventricles of the heart is 115 when the ventricles are contracting and 70 when the ventricles are relaxing. D. diastolic pressure is 115 and the systolic pressure is 70. E. pressure in your brachial artery during ventricular contraction is 115 while the pressure during atrial contraction is 70.
The asexual spores of molds are classified according to their
A) size. B) type of metabolism. C) number of chromosomes. D) shapes. E) mode of development.
Which pf the following explains why gases are termed "compressible" and liquids are not?
a) particles have fixed volume and are able to occupy the contained in which they are contained b) particles do not have much empty space between them, thus making them rigid c) particles have a large amount of empty space between them d) particles are held closely together by intermolecular forces