Final answer:
Cilia and flagella are the structures in the cell membrane used for movement and to catch food. Cilia are many, short, and hair-like, while flagella are fewer, longer, and assist in moving the entire cell. Pseudopodia and microvilli are not involved in such functions.
Step-by-step explanation:
The structures in the cell membrane that are used for movement and to catch food are called cilia and flagella. Cilia are short, hair-like structures found on the cell surface. They are numerous and can function to move cells or substances across the cell surface, such as mucus in the respiratory tract. They also assist in feeding by sweeping food particles towards the cell's mouthpart in certain protozoans.
On the other hand, flagella are longer and are typically found fewer in number on a cell. They are responsible for the movement of the entire cell, like sperm or certain protists. Another structure, pseudopodia, serves a similar purpose in some organisms, allowing them to creep along surfaces. Microvilli are fingerlike projections that increase a cell's surface area for absorption and are not used for movement or catching food.