Hammerhead sharks are part of this class of fish
A) osteichthyes
B) cartilaginous
C) agnatha
D) sharkailnous
Ans: B) cartilaginous
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Mutations in DNA are usually repaired in healthy cells by DNA repair enzymes
Indicate whether the statement is true or false
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.
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.