Q: The major classes of living members of this phylum include gastropods, bivalves, and cephalopods? Read this paragraph and choose the correct option from the provided answers: There are approximately 160,000 living species and probably 70,000 extinct species of mollusks. They are typically divided into ten classes, of which two are extinct. The major classes of living mollusks include gastropods, bivalves, and cephalopods ( Figure below ). Choices: - insects - crustaceans - invertebrates - mollusks A:
mollusks

Q: Each organism inherits one of what item for each gene from each parent? Read this paragraph and choose the correct option from the provided answers: Choices: - molecule - phenotype - cell - allele A:
allele

Q: What helps amplify the effects of extracellular signals? Read this paragraph and choose the correct option from the provided answers: The effects of extracellular signals can also be amplified by enzymatic cascades. At the initiation of the signal, a single ligand binds to a single receptor. However, activation of a receptor-linked enzyme can activate many copies of a component of the signaling cascade, which amplifies the signal. Choices: - electrical cascades - spontaneous cascades - mutation cascades - enzymatic cascades A:
enzymatic cascades