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Single-Celled and Multi-Celled Organisms

Grade 6 · Science · Cells and Organisms · Newfoundland and Labrador, Canada

Lesson Summary

Some organisms are made of just one cell that does everything, while others are made of trillions of specialized cells.

Explanation

Single-celled organisms, like bacteria and amoebas, consist of just one cell that performs all life functions: eating, moving, reproducing, and getting rid of waste. Multi-cellular organisms, like humans, plants, and animals, are made of many cells that specialize in different tasks. For example, muscle cells contract, nerve cells send signals, and red blood cells carry oxygen. Being multi-cellular allows organisms to grow larger, live in more environments, and have complex body systems.

Practice Questions

Q1: Give an example of a single-celled organism.
Answer: Bacteria, amoebas, or paramecia are examples of single-celled organisms.
Q2: What is the advantage of being multi-cellular?
Answer: Multi-cellular organisms can grow larger, have specialized cells for different jobs, and develop complex body systems.
Q3: How does a single-celled organism survive with just one cell?
Answer: That one cell carries out all life functions on its own, including taking in food, releasing energy, removing waste, and reproducing.
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People Also Ask

What is Single-Celled and Multi-Celled Organisms in Grade 6 Science?+

Single-Celled and Multi-Celled Organisms is a lesson in the Cells and Organisms chapter of Grade 6 Science. It is part of the Newfoundland and Labrador, Canada school curriculum and covers key concepts that students need to understand at this level.

What grade level covers Single-Celled and Multi-Celled Organisms?+

Single-Celled and Multi-Celled Organisms is taught in Grade 6 as part of the Science curriculum in Newfoundland and Labrador, Canada.

How can I help my child with Cells and Organisms in Science?+

Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Cells and Organisms topics.

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