Why do embryos develop longer Inside the mother's body? Mammals develop more slowly because they are bigger.
Embryos are more fragile because they are smaller than amphibian eggs.
Embryos do not have eggshells that will protect them from the outside environment.
The embryos of all mammals are larger than animals that lay eggs.

the endomembrane system is a series of compartments that work together to package, label, and ship proteins and molecules. in your cells, the endomembrane system is made up of both the endoplasmic reticulum and the golgi apparatus. these compartments are folds of membranes that form tubes and sacs in your cells.

every el niño cycle is different. every year.

oxygen +1 most likely