During prophase, ________________ condense(s) into visible chromosomes.
a. chromatin
b. centrioles
c. centromeres
d. kinetochores
e. colchicine
Answer: a. chromatin
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During meiosis in the female, sex chromosomes segregate to produce two types of eggs: Xbearing eggs and Y-bearing eggs
A. true B. false
Which study indicates that some mutations are inherited from our parents?
a. study of mutations in nerve cells b. study of mutations in somatic cells c. study of mutations in germline cells d. study of mutations in premature infants e. study of mutations in in vitro babies
Which of these methods can be used to determine the number of viable microorganisms in a sample?
A. Counting a known volume of cells in a hemocytometer B. Measuring colony forming units per ml C. Measuring total cell mass D. Light scattering in a spectrophotometer
The gas exchange surfaces in a mammalian lung are organized into structures that look like clusters of hollow grapes. The hollow, grape-like structures are the________.
A. alveoli B. lamellae C. parabronchi D. bronchi E. opercula