The G? subunit is responsible for activation of ________.
Fill in the blank(s) with the appropriate word(s).
adenylyl cyclase
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In many cells, the adhesion to the extracellular matrix through integrins causes the activation of kinases in the cytoplasm. This suggests that:
A. integrins promote the activation of signaltransduction pathways. B. integrins are kinases. C. extracellular matrix proteins are receptors and integrins are ligands.
The body symmetry of adult echinoderms could best be described as ________.
A. fivefold symmetrical B. fourfold symmetrical C. bilateral D. asymmetrical
Which of the following is a list of taxa, that along with their common ancestors, constitutes a monophyletic clade?
A. Prokaryotes B. Eukaryotes C. Protists D. All of the above E. None of the above
Hydra, anemones, and jellyfish are in the phylum
A) Flagellates. B) Cnidaria. C) Platyhelminthes. D) Porifera. E) Protista.