A female cat that is small due to nutritional deficiencies experienced in early life will give birth to smaller kittens than a genetically identical cat that is larger in size due to better nutrition in early life, even if both female cats were bred
to the same male cat and both had good nutrition during pregnancy. The term that is used in measuring this type of variation is A) VP.
B) VE.
C) VEG.
D) VES.
E) VEM.
E
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A mutation in TFIIIE could result in
A. a failure of the RNA polymerase to bind to TFIIB B. a failure of the RNA polymerase to maintain an closed complex C. a failure of the RNA polymerase to maintain an open complex D. no effect on transcription
A number of different types of microscopy exist. Each type of microscopy has advantages and disadvantages. Can you identify the microscope that would be most advantageous for the situation below?
a. A cell biologist wishes to visualize the ribosomes of a cell. b. A bacteriologist wishes to examine the motility of a bacterium. c. An immunologist wishes to determine if a lymphocyte possesses a certain surface protein. d. A virologist is trying to determine the three-dimensional shape of a virus. e. A pathologist is trying to examine the cytoplasm of a cell for changes that result from viral infection.
Which of the following choices best summarizes the results of the experiment by Damschen and her
colleagues in the graph above?
a. Habitat patches with landscape corridors are at higher risk of encroachment by exotic species than isolated habitat patches are. b. Over time, the number of native species harbored by habitat patches with landscape corridors was increasingly greater than in isolated habitat patches. c. The number of both native and exotic species increased over time in habitat patches that were connected by landscape corridors. d. The number of native species increased over time in isolated habitat patches but not in those connected by corridors. e. The number of exotic species is greater than the number of native species.
Sickle-cell trait occurs in individuals heterozygous for the autosomal-recessive gene. What is the likelihood that a person who has two parents with sickle-cell trait will have the disorder?
A) 100% (certain) B) 0% (impossible) C) 50% D) 25% E) not enough information given to answer the question