Consider the work Mendel did with his pea plants. Why is the study of human genetics much more difficult? What will be an ideal response?
ANSWER: Compared to peas, humans are a difficult species on which to perform genetics. First, we
have a long generation time making studies of the multiple generations difficult. Second, we
produce relatively few offspring which weakens statistical analysis. Third, we can't ethically
be told who to mate with so controlling crosses is difficult. Fourth, we can't self-fertilize.
Fifth, many of our traits do not follow simple Mendelian inheritance patterns. The list goes
on and on.
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The membrane filter technique can be used in all waters and has completely replaced the MPN technique.
Answer the following statement true (T) or false (F)
Four of the five answers are traits of amphibians. Select the exception
a. carnivores b. amniote c. scaleless d. land dwelling e. typically breed in water
Activated B cells divide to form plasma cells and memory B cells, both of which are short-lived and secrete copious
amounts of antibody molecules into the bloodstream. a. True b. False
Which type of ecosystem has low primary production but nonetheless contributes a large proportion of Earth's total net primary production?
A) tropical rain forest B) coral reef C) open ocean D) desert