Modern humans evolved about
(a) 200,000 years ago.
(b) 2,000,000 years ago.
(c) 2,000,000,000 years ago.
(d) 4,600,000,000 years ago.
(a) 200,000 years ago.
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According to kin selection, a man should die to save the life of
A. one brother. B. one or more brothers. C. two or more cousins. D. four or more cousins. E. eight or more cousins.
The pattern of gene transfer from Hfr to F- cells ____
a. occurs with genes furthest from the F factor being transferred first
b. can be used to map chromosomal genes in the F- cell c. was used to map the E. coli chromosome d. cannot be used to indicate the relative positions of genes within the Hfr cell e. is random because the F factor moves between different positions in the chromosome
Which of the following could be an example of a limiting resource?
a. genetic mutations b. plenty of nesting sites c. amount of precipitation d. abundant food e. growth rate
What is the interpretation of the following patient results? (normal values) WBC = 90.0 th/uL (5.0-10.0 th/uL,), with 89% lymphs (20-40%); CD3 = 90% (60-80%); CD5 = 87% (60-80%); CD10 = 0% (< 1%); CD4 = 88% (30-65%); CD20 = 12% (5-20%); CD34 = 0% (< 1%); CD8 = 3% (10-40%); kappa = 10% (3-15%); lambda = 5% (2-10%); CD19 = 15% (5-20%).
A) normal B) B-cell acute leukemia C) T-cell acute leukemia D) B-cell chronic leukemia E) T-cell chronic leukemia