The amniotic egg evolved as an adaptation
A. to prevent desiccation.
B. to permit the embryo to develop undisturbed up to the time of hatching.
C. to insure survival in the uterus.
D. against predation.
Answer: A
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Chitin, a modified form of cellulose, is not only cross-linked with proteins but its glucose units are modified with atoms of:
A. nitrogen. B. hydrogen. C. oxygen. D. sulfur. E. phosphorous.
The correct sequence of taxonomic groupings, from the most to the least comprehensive, is __________.
Fill in the blank(s) with the appropriate word(s).
In general, when sexual selection is strong for one sex and weak for the other, we can predict that members of the sex subject to strong sexual selection will be ________, and members of the sex subject to weak sexual selection will be ________
A) choosy; competitive B) aggressive; passive C) competitive; showy D) competitive; choosy
The goal of pharmacogenetics is to identify genes related to human diseases. Indicate whether the statement is true or false