The large, central canal of a poriferan is know as the:
1.Choanocyte
2.Osculum
3.Porocyte
4.Spongocoel
4
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The outer part of the enzyme linked receptor has a binding site for a signaling molecule, and the part of
the receptor that extends into the cytosol has a binding site for a specific G protein. __________________ Indicate whether the statement is true or false.
________ induces dormancy in seeds and buds and causes stomata to close
A) Abscisic acid B) Gibberellin C) Ethylene D) Cytokinin E) Auxin
Warts are caused by
A) papillomavirus. B) poxvirus. C) herpesvirus. D) parvovirus. E) Staphylococcus aureus.
Cytochromes and oxygenases require ________ to function; therefore, for cells that use these enzymes in cellular respiration, it must be supplied in a growth medium
a. iron b. lithium c. magnesium d. selenium