In which vertebrate group are there two atria but only a single ventricle?
A) Some reptiles
B) Crocodiles
C) Birds
D) Fishes
E) Mammals
A
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Human caused introductions can occur by which of the following? Check all that apply.
_____ plants and animals accidentally escaping from ships _____ automobile or truck tires _____ being in the soil or on a plant sold at a nursery _____ seeds or organisms attaching to clothing or shoes _____ international cargo ships releasing ballast water in the ocean before arriving at port
Pseudoephedrine, based on the chemical structure of ephedrine from the Gnetophyte genus Ephedra was used as a treatment for:
A. cancer B. nasal blockage C. headache D. malaria E. erectile dysfunction
In times of stress, the sympathetic nervous system decreases blood pressure
Indicate whether the statement is true or false.
The process of relaying a growth-stimulatory or growth-inhibitory signal in response to an extracellular factor binding at the cell surface is called intercellular signaling
Indicate whether the statement is true or false