The is a rigid layer of nonliving material that surrounds the cells of plants.
a. nucleolus
b. cell wall
c. nuclear envelope
d. stem

Which element provides strength to the exoskeleton of clams and oysters

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

How can active reading strategies you? o a. they can you get into better physical shape. o b. they can you read fewer science articles. o c. they can you understand what you read. o d. they can you avoid reading altogether.