Final answer:
The three methods of entry into plant cells are mechanical force, endocytosis, and direct injection. OPTION A IS ANSWER
Step-by-step explanation:
There are three methods of entry into plant cells: mechanical force, endocytosis, and direct injection. Mechanical force refers to the physical pressure applied to the cell, such as when a sharp object punctures the cell membrane.
Endocytosis is a process in which the cell engulfs particles or molecules by forming a pocket in the membrane and pinching it off. Direct injection occurs when a substance is injected directly into the plant cell without the need for membrane invagination. OPTION A IS ANSWER