An antibody molecule consists of a total of
a. two polypeptide chains.
b. four polypeptide chains.
c. two polysaccharide chains.
d. four polysaccharide chains.
e. four phospholipids chains.
B
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Prior to the publication of Charles Darwin's book, On the Origin of Species, what was the prevailing public consensus regarding species evolution?
A. That species were permanent and unchanging B. That species evolved through physical changes that led to success C. That species were modified over time, but did not change into new species D. That species evolved by means of natural selection
An epidemic is
A. a disease that maintains a steady low-level frequency. B. a sudden increase in the occurrence of a disease above the expected level. C. a sudden unexpected occurrence of a disease in a limited segment of a population. D. when a disease occurs occasionally and at erratic intervals in the human population.
The observations you make and experimental data you collect in your biology laboratory class are
examples of:
a. statistical analysis. b. hypothesis building. c. biological dogma. d. model systems. e. biological research.
After conjugation between an F+ cell and an F- cell, is the F- cell F- or F+? After conjugation between
an Hfr cell and an F- cell, is the F- cell F- or F+? Explain each answer.
What will be an ideal response?