The flukes and tapeworms are covered by a protective
a. cuticle.
b. shell.
c. scales.
d. slime layer.
b
Biology & Microbiology
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Transmembrane movement of a substance with a concentration gradient, with no involvement of membrane proteins, is called ________.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
What term describes an innate response to a simple and specific stimulus?
a. imprinting b. instinct c. learned behavior d. habituation e. a conditioned response
Biology & Microbiology
What is x in tetraploid oysters?
A) 5 B) 10 C) 20 D) 40
Biology & Microbiology
The first animals evolved ________.
A. 600 thousand years ago B. 6 thousand years ago C. 600 million years ago D. 60 thousand years ago
Biology & Microbiology