One of the neurotransmitters of the sympathetic nervous system that increases the heart rate and constrict smooth muscle in blood vessels to raise blood pressure is -

Aristotle classified animals according to their a. habitat and mating behavior c. mating behavior and relatedness b. habitat and physical differences d. physical differences and mating behavior

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates