Question for Multicellular organisms Try yourself: How are multi-celled and single-celled organisms different? A. Multi-celled organisms need energy to survive, while single-celled organisms need no energy to survive. B. Single-celled organisms can be seen without using a microscope, while multi-celled organisms are microscopic. C. Multi-celled organisms have large numbers of specialized cells to perform a variety of life functions, while single-celled organisms complete life functions with one cell. D. Single-celled organisms have large numbers of identical cells that all perform the same function, while multi-celled organisms have cells that are all different and perform different life functions. View Solution

Multi-celled organisms need energy to survive, while single-celled organisms need no energy to survive.

Single-celled organisms can be seen without using a microscope, while multi-celled organisms are microscopic.

Multi-celled organisms have large numbers of specialized cells to perform a variety of life functions, while single-celled organisms complete life functions with one cell.

Single-celled organisms have large numbers of identical cells that all perform the same function, while multi-celled organisms have cells that are all different and perform different life functions.

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Multicellular organisms Video Lecture - Class 9

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FAQs on Multicellular organisms Video Lecture - Class 9

1. What is a multicellular organism?

Ans. A multicellular organism is an organism that is composed of more than one cell. These cells work together to perform various functions and form specialized tissues and organs.

2. How do cells in a multicellular organism communicate with each other?

Ans. Cells in a multicellular organism communicate with each other through chemical signals. These signals can be in the form of hormones, neurotransmitters, or other signaling molecules that allow cells to coordinate their activities and respond to changes in the environment.

3. What are the advantages of being a multicellular organism?

Ans. There are several advantages of being a multicellular organism. Firstly, multicellular organisms can achieve larger sizes and have more complex structures compared to single-celled organisms. Secondly, multicellularity allows for division of labor, where different cells can specialize in specific functions, increasing efficiency. Lastly, multicellular organisms have a higher level of complexity and can exhibit more intricate behaviors and adaptations.

4. How do cells in a multicellular organism differentiate into different types?

Ans. Cells in a multicellular organism differentiate into different types through a process called cell specialization or cell differentiation. This process involves the activation and repression of specific genes, which leads to the development of unique characteristics and functions in different cell types.

5. What are some examples of multicellular organisms?

Ans. There are numerous examples of multicellular organisms, including humans, animals such as dogs, cats, and birds, plants, fungi, and many other organisms. These organisms are composed of specialized cells that work together to carry out various functions for their survival and reproduction.

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