They are plants without a vascular system
A terrestrial ecosystem is a land-based community of organisms.
Answer:
protection
Explanation:
The cell wall is the protective, semi-permeable outer layer of a plant cell. A major function of the cell wall is to give the cell strength and structure, and to filter molecules that pass in and out of the cell.
Answer: D
Explanation: Quick Explanation since you're in a hurry but I found that demographic transition makes the birth rate higher. D should be your best choice