Hammerhead sharks are part of this class of fish
A) osteichthyes
B) cartilaginous
C) agnatha
D) sharkailnous
Ans: B) cartilaginous
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What do G-protein coupled, enzyme-linked, and ligand-gated ion channel receptors have in common?
A. They associate with a protein bound to GDP or GTP. B. They are all linked to protein kinase activation. C. They change their conformation when bound to a hormone. D. They open ion channels. E. They bind similar hormones.
Mutations in DNA are usually repaired in healthy cells by DNA repair enzymes
Indicate whether the statement is true or false
Blood pressure that is consistently ________ or higher would indicate that you have hypertension
A) 120/80 B) 140/90 C) 110/85 D) 100/75
Parallel evolution involves
A. any two organisms with the same trait. B. two organisms sharing the same trait because they have a common ancestor with that trait. C. two lineages acquiring the same trait independently without the trait being present in a common ancestor. D. possession of homologous structures. E. All of the choices are part of parallel evolution.