Looks like jelly and is responsible for making red blood cells.

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

During binary fission, what events must occur before the cell splits into two new cells?

When is your breathing likely to speed up? a. when your white blood cells increase b. when your cells need more energy c. when your heart cells need more carbon dioxide d. when your blood cells have too much oxygen