Marc Spehr and his colleagues demonstrated which of the following?

a. Sperm cannot detect and swim toward attractant molecules.
b. Sperm attraction can be stimulated by chemicals.
c. Eggs release chemicals that attract sperm.
d. Sperm can detect and swim toward attractant molecules, and sperm attraction can be
inhibited by chemicals.
e. Sperm can release chemicals that kill other sperm


D

Biology & Microbiology

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