PLZ HELP . Flattened, hollow folds and sacs of endoplasmic reticulum are called cisternae.
a. TRUE
b. FALSE

The answer is A . True because the ER is a network membranes that from hollow tubes flattened sheets , and round sacs . These flattens , hollow folds and sacs are called cisternae.

In the air and in the lower fre ah water

Centriole.centrioles are present in animal cells but are usually absent in plant cells.