What cellular structure must oxigen cross to get from the outside to the the inside of an animal cell?

1) the nucleus

2) the cytoplasm

3) the plasma membrane

4) the cell wall

How many times must a cell divide to create eight cells

What is used to determine phylogeny? mutations DNA evolutionary history organisms on earth

Cellular transport definition

Which is a biotic component of a marine ecosystem? detritus on the ocean floor the oxygen concentration of the water rocks on the ocean floor?

At what stage of development does the brain essentially reach its adult size?

How are pressure measurements related to weather prediction apex?

In which aquatic ecosystem does fresh water meet salt water? wetlands intertidal zones estuaries neritic zones

What does Hierachy of Biological Order mean

In giraffes, long necks (n), long legs (l), dark spots (d), and the ability to digest maize (m) are all dominant traits. what possible genotype could a long-necked, short-legged, light-spotted, maize-digesting giraffe have?

How much ug of protein are we suppose to load on sds precast gel?