Which of these characteristics is common only at the embryonic stage of fish and humans, and is suggestive of a common ancestor between the two?

Apatient is in need of hydration. which type of solution are the patient's cells most likely in?

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis.b. the primary role of microbes on the planet involves causing disease in animals and humans.c. microbes produce vitamins in the intestines.d. microbes play a role in breaking down waste and decomposing dead organisms.

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks