Multicellular and Unicellular Organisms

What are cilia?

• Short, hair-like structures on the surface of some cells, like Paramecium, that help in movement and feeding.

• Long, whip-like structures used for cell division.

• Small, round organelles that store nutrients in cells.

• Flat, plate-like structures that provide structural support to cells.

What is a unicellular organism?

• An organism that consists of a single cell, such as bacteria or amoeba.

• An organism that consists of multiple cells working together.

• An organism that can live in extreme environments, like deep-sea vents.

• An organism that is visible to the naked eye, like a tree or a flower.

How does Paramecium move?

• Using flagella, which are long whip-like structures.

• Using cilia, which are tiny hair-like structures that cover its surface.

• By contracting its body in a wave-like motion.

• Through the use of pseudopodia, which are temporary projections of the cell.

What is a producer in an ecosystem?

• An organism that produces its own food, typically through photosynthesis, and serves as a food source for other organisms.

• An organism that consumes other organisms for energy.

• An organism that decomposes dead matter and recycles nutrients back into the ecosystem.

• An organism that relies on external sources for food and energy.

How does Amoeba move?

• By swimming using cilia

• By extending its pseudopods, which are temporary projections of its cytoplasm.

• By contracting its muscles

• By using flagella to propel itself

What is the role of producers in an ecosystem?

• Producers are organisms that consume other organisms for energy.

• Producers form the base of the food chain by creating energy through photosynthesis, supporting all other life forms.

• Producers are responsible for decomposing organic matter in the ecosystem.

• Producers are the primary consumers that feed on herbivores.

What are prokaryotes?

• Single-celled organisms that lack a nucleus, such as bacteria.

• Multicellular organisms with a defined nucleus, such as plants.

• Organisms that can photosynthesize, like algae.

• Complex organisms with specialized cells, such as animals.

What is a flagellum?

• A long, whip-like structure that helps some unicellular organisms, like Euglena, to move.

• A type of cell organelle responsible for protein synthesis.

• A structure that provides rigidity to plant cells.

• A small, hair-like structure that helps in the absorption of nutrients.

What is a pseudopod?

• A temporary, foot-like extension of a cell, used by some unicellular organisms like Amoeba for movement and feeding.

• A permanent structure used for cell division in multicellular organisms.

• A type of organelle found in plant cells for photosynthesis.

• A method of asexual reproduction in bacteria.

How does Euglena move?

• By using cilia to paddle through water

• By using a flagellum to swim in water

• By contracting its body like a worm

• By floating with the current