Answer:
The endoplasmic reticulum (ER) is a membranous organelle that shares part of its membrane with that of the nucleus. Some portions of the ER, known as the rough ER, are studded with ribosomes and are involved with protein manufacture.
Explanation:
they advantages of an increase in size without its limitations
2 gametic isolation
pt 1 animal
Exp
i think it would be b
add plants and trees
they help hold the soil in place because of their roots