In a signal transduction pathway involving phospholipid products as second messengers, after a G protein is activated,
the activated G protein then activates:a.
IP2.
b. IP3.
c. protein kinase C.
d. phospholipase C.
e. adenylyl cyclase
d
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Fungi digest organic matter
a. by using bacterial endosymbionts. b. with extracellular enzymes. c. in their fruiting bodies. d. inside the hyphal cells, after phagocytosis. e. by using hydrolytic enzymes of their host cells.
In a population of rabbits, some evolve the
ability to outrun foxes. This is an example of ____ selection.
a. directional b. stabilizing c. disruptive d. mutational e. restricted
The veins of leaves are used for
a. support. b. identification. c. transport of water and nutrients. d. detachment in the autumn. e. regeneration.
The placement of chromosomes into one of the seven groups in a karyotype is based on the
chromosome's A. size. B. centromere position. C. banding pattern. D. size and centromere position only. E. all of these.