Which of the following is an example of monosomy?
A) Turner's syndrome
B) Klinefelter's syndrome
C) Down syndrome
D) trisomy X
Answer: A
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Which of the following statements about the strands of a newly replicated DNA molecule is correct?
A. Both strands are made up of newly assembled nucleotides. B. One strand is new and the other is from the original molecule. C. Both strands contain some nucleotides from the original molecule. D. The sugar-phosphate chains are conserved and new bases are inserted between them. E. The base pairs are conserved and new sugar-phosphate backbones are built up on them.
True or False: Mycorrhizal associations are beneficial to the plant at a very minimal cost in carbohydrates
A. true B. false
Lymphocytes called __________________ secrete antibodies.
A. plasma cells B. T cells C. helper T cells D. natural killer cells
Population size levels off at the ________ of an environment.
A. biotic potential B. population growth C. carrying capacity D. environmental resistance