Which of the following facts is the best evidence that humans and salamanders had a common ancestor? A) Both species eat meat.
B) Both species have pharyngeal arches and slits when they are embryos.
C) Both species can swim.
D) Both species have skin.

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

During an experiment, readings for blood pressure in a persons body were found to be constant . however , when he measured by a different blood pressure cuff , the readings differed by 15 points for each reading. this difference indicates that the results are

Which organ controls breathing? lungs alveoli heart diaphragm