What is cell class 9 short?
A cell is defined as the ‘basic structural and functional unit of life. The term cell was first coined by Robert Hooke in 1665. It is so defined because every organism present in the world is made up of cells so we can also refer to cells as the building blocks of a living system.
What is cell definition short?
A cell is a mass of cytoplasm that is bound externally by a cell membrane. Usually microscopic in size, cells are the smallest structural units of living matter and compose all living things. Most cells have one or more nuclei and other organelles that carry out a variety of tasks.
What is the cell short 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.
What is the definition of a cell in Class 8?
A cell is defined as the basic smallest structural and functional unit of an organism.
What is the best cell definition?
noun. plural host cells. : a living cell invaded by or capable of being invaded by an infectious agent (such as a bacterium or a virus) This drug integrates with the virus in a way that prevents it from attaching to host cells, and prevents viral replication of cells already infected.
What is cell in physics?
Definition: A cell is a single electrical energy source that uses chemical reactions to produce a current. An electrical cell is an ‘electrical power supply’. It converts stored chemical energy into electrical potential energy. The cell comprises two electrodes and an electrolyte.
What is cell in one words?
The cell (from Latin cella, meaning small room) is the basic structural, functional, and biological unit of all known living organisms. Cells are the smallest unit of life that can replicate independently, and are often called the building blocks of life.
Why is it called a cell?
Robert Hooke suggested the name ‘cell’ in 1665, from the Latin cella meaning storeroom or chamber, after using a very early microscope to look at a piece of cork. It is also said that he thought that the rectangular chambers looked like the cells in some monasteries.
What is cell wall class 9?
The cell wall is the outermost covering of a plant cell. It is a tough and flexible (sometimes rigid) layer that provides structural support and protection to the cell.
What is the full form of cell?
Caller enabled leased line is the full form of cell.
What is mean by cell biology?
Cell biology is the study of cell structure and function, and it revolves around the concept that the cell is the fundamental unit of life. Focusing on the cell permits a detailed understanding of the tissues and organisms that cells compose.
What is cell answer Class 7?
Answer: a. Cell is the smallest unit of life. They are the structural, functional and biological uits of life. The discovery of cells was first made by Robert Hooke.
Who discovered cell class 9?
Cell was discovered by a British scientist, Robert Hooke in 1665. He observed cells in a cork slice under his self-designed microscope and noticed honeycomb like compartments. He coined them as cells.
What is cell organelles Class 9?
Cell organelles are defined as specialized subunits present within a cell that carry out a specific function and are usually enclosed within its membrane. These are present in the cytoplasm and activities of the cell are carried out by them.
What is a cell in computer?
A cell is a specific location within a spreadsheet and is defined by the intersection of a row and column. Since most spreadsheets use numbers to define rows and letters to define columns, cells are often referenced by a letter and number combination.
Why it is called a cell?
Hooke detailed his observations of this tiny and previously unseen world in his book, Micrographia. To him, the cork looked as if it was made of tiny pores, which he came to call “cells” because they reminded him of the cells in a monastery.
What is cell simple for kids?
The cell is the smallest unit with the basic properties of life. Some tiny organisms, such as bacteria and yeast, consist of only one cell. Large plants and animals have many billions of cells. Human beings are made up of more than 75 trillion cells. The study of cells is a branch of biology.