The largest membrane of the body, the ____________ provides a protective barrier from environmental factors such as chemicals, water, microbes, and mechanical trauma.
Fill in the blank(s) with correct word
Ans: cutaneous membrane
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Migration is going to have what kind of effect on the genetic variation between populations?
A. decrease variation B. increase variation C. will not affect variation D. maintain variation
Which of the following is TRUE of cell cleavage?
A. It involves consecutive cycles of cell division without cell growth. B. It forms a blastula. C. It is a rather slow event of embryonic development. D. It involves consecutive cycles of cell division without cell growth and forms a blastula. E. It is a rather slow event of embryonic development involving consecutive cycles of cell division.
One problem with using common names is that
a. many organisms may have the same common name. b. many common names may exist for the same organism. c. the common name may vary by language and region. d. all of the above are true.
Who demonstrated that cell-produced proteins called enzymes were responsible for chemical reactions in a cell?
Eduard Buchner Robert Koch Lazzaro Spallanzani Louis Pasteur