Which animal clade lacks specialized tissues derived from the germ layers of the embryo?
a. Cnidaria
b. Ctenophora
c. Placozoa
d. Bilateria
c. Placozoa
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Which of the following is NOT part of the
initial response to cold temperature? a. vasodilation of peripheral blood vessels b. shivering c. muscle contractions d. shunting of the blood to the core regions of the body e. increased metabolism
Mutations in ____________________ cells will be passed on by cell division, but cannot be transmitted to future
generations. Fill in the blank(s) with the appropriate word(s).
The erectile tissue in the penis includes the:a
prepuce. b. mons pubis. c. cavernous bodies. d. seminal vesicles. e. vas deferens.
Heavy metals such as silver, mercury and copper are effective antimicrobials due to their ability to bind to the regulatory site of enzymes, thus acting as an irreversible non-competitive inhibitor.
Indicate whether the statement is true or false