class 8 science chapter cell
Answers
Answer:
"Cells" are the basic functional unit of living matter. A single cell can be a complete organism as in the case of bacteria and protozoa. Cells are known as the building blocks of a living organism.
Living organisms are made up of cells whereas non living things are made up of atoms and molecules.
On the basis of number of cells present in an organism, there are two divisions:
☆ Unicellular
☆ Multicellular
On the basis of the structure of a cell in an organism, there are two divisions:
☆ Prokaryotes
☆ Eukaryotes
Main structures present in a cell are :
- Cell membrane
- Cytoplasm
- Nucleus
In addition to these, cell organelles are also present in a cell such as mitochondria, golgi apparatus, ribosomes, etc.
Answer:
Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. ... Cells have many parts, each with a different function.