The spread of a cancer from one tissue to another is known as ____
a. benign tumor
b. metastasis
c. malignant tumor
d. remission
e. neoplasm
ANSWER: b
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An IgG molecule has two
A. heavy chains. B. light chains. C. antibody binding sites. D. antigen binding sites. E. heavy chains, light chains AND antigen binding sites.
Which of the following situations would be MOST likely to produce a new species?
A. A group of polyploid individuals arises by an abnormal meioses. The polyploids can only produce viable offspring by mating with each other. B. Several individuals join an existing population and introduce several new, beneficial alleles. C. Several individuals colonize a new area and establish a population. Migration between the two populations is common. D. An existing species becomes subdivided by a glacier and the resulting groups remain physically isolated from each other for thousands of years. When the glacier melts, the two groups are able to interbreed. E. A volcano erupts and kills all of the frogs on an island, along with many other species. New frogs colonize the island and begin reproducing rapidly because there are no longer any frog predators.
The accompanying figure details the possible outcomes in a scenario in which 10 zygotes are formed from a gene pool where frequency of the allele A1 is 0.6, and A2 is 0.4. This graph is shown here
According to this graph, the probability that the frequency of A1 will remain the same in the next generation is about ________. A) 8% B) 12% C) 16% D) 18% E) none of the above
Some advanced mushrooms produce club shaped cells that produce sexual spores. These structures are called
a. asci b. basidia c. zygospores d. arbuscles e. gills