Which of the following methods was not used by Mendel in his study of the genetics of the garden pea?
A: Maintenance of true-breeding lines
B: Cross-pollination
C: Production of hybrid plants
D: Quantitative analysis of results
E: Microscopy of the pea chromosomes.
Ans: E: Microscopy of the pea chromosomes.
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How many DNA molecules are in a somatic cell of the snail in G2 phase?
A) 4 B) 8 C) 16 D) too many to count
Why does extended hypoglycemia (low blood sugar) lead to confusion and difficulty thinking?
A. Glucose provides energy for brain cells. B. Unregulated pH of body fluids causes these symptoms. C. Glucose is major source of energy for non-nervous system cells. D. Glucose is required for chemical reactions in the body.
What is the explanation for the mass extinction episode that brought about the demise of the dinosaurs?
What will be an ideal response?