Sickle-cell anemia has been traced to what type
of mutation?
a. frameshift
b. base-pair substitution
c. mutagenic
d. transposable element
e. viral
B
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Which of the following is true of plant cells?
A) Plant cells may contain chloroplasts. B) Plant cells are always much larger than animal cells. C) Chromosomes are found only in plant cells. D) Only plant cells have a cell membrane. E) The plant cell has no cell wall.
What leads to an individual having too many or two few chromosomes?
A) Crossing over B) Independent assortment C) Homologous recombination D) Nondisjunction
Respiration is measured in a human. How do the concentrations of O2 and CO2 in inhaled air compare with exhaled air?
A. Inhaled air has less O2 and CO2 than exhaled air. B. Inhaled air has more O2 and less CO2 than exhaled air. C. Inhaled air has more O2 and CO2 than exhaled air. D. Inhaled air has less O2 and more CO2 than exhaled air.
Tiana is viewing a sample under the microscope, and she describes what she sees as: "Small purple blobs, oval in shape, some look like a large oval connected to a small oval" Which specimen is she most likely viewing?
A) Budding yeast B) Spirogyra C) Amoeba D) Aspergillus