Different species of heterotrophic unicellular organisms such as amoeba and Actinobacteria are found in freshwater sources. The feature that distinguishes amoeba from Actinobacteria is the — a) presence of ribosome
b) ability to maintain homeostasis.
c) ability to reproduce.
d) presence of a nuclear membrane.

Baroreceptors in the aortic arch and carotid bodies are mechanoreceptors that respond to the stretch that occurs in these arterial walls with changes in blood pressure. if pressure changes rapidly, the baroreceptors initiate a feedback mechanism that reduces blood pressure; however, if pressure changes slowly, as in developing hypertension, the receptors do not respond. given this information, the baroreceptors are most likely which type of receptor?