The biological concept of species requires that
A) organisms reproduce sexually.
B) individuals are able to reproduce outside the group.
C) only asexual reproduction occurs.
D) geographic isolation occurs.
E) organisms are morphologically similar.
A
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The position of the head with respect to gravity is detected by receptors in the basilar membrane
Indicate whether the statement is true or false.
Who invented the first crude microscope by grinding glass?
A. Pasteur B. Schultz and Schwann C. Redi D. Lister E. Leeuwenhoek
Which of the following are qualities of any good scientific hypothesis?
I. It is testable. II. It is falsifiable. III. It produces quantitative data. IV. It produces results that can be replicated. A) I only B) III only C) I and II D) III and IV
Enterotoxins are
A. proteins. B. exotoxins. C. virulence factors. D. toxins that target the intestines. E. All of these choices are correct.