Which organism has a central brain? flatworm, hydra, sponge, fish?

Which locations on the map are low-pressure areas? a b c d e

Suppose you could go back in time to interview henri becquerel on the day he discovered radioactivity. from his perspective, write an account of the discovery.

Sickle cell amelia is a condition condition where the red blood cells are deformed which is affected by sickle cell amenia