Question

what is cell ?Explain in 150 to 200 words.

Answer 1

The cell (from Latin cella, meaning "small room"[1]) is the basic structural, functional, and biological unit of all known living organisms. A cell is the smallest unit of life. Cells are often called the "building blocks of life". The study of cells is called cell biology.

Cell

Onion (Allium cepa) root cells in different phases of the cell cycle (drawn by E. B. Wilson, 1900)



A eukaryotic cell (left) and prokaryotic cell (right)

IdentifiersMeSHD002477THH1.00.01.0.00001FMA68646Anatomical terminology

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Structure of an animal cell

Cells consist of cytoplasm enclosed within a membrane, which contains many biomolecules such as proteins and nucleic acids.[2] Organisms can be classified as unicellular (consisting of a single cell; including bacteria) or multicellular (including plants and animals).[3] While the number of cells in plants and animals varies from species to species, humans contain more than 10 trillion (1013) cells.[4] Most plant and animal cells are visible only under a microscope, with dimensions between 1 and 100 micrometres.[5]

Cells were discovered by Robert Hooke in 1665, who named them for their resemblance to cells inhabited by Christian monks in a monastery.[6][7] Cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells, that cells are the fundamental unit of structure and function in all living organisms, and that all cells come from pre-existing cells.[8] Cells emerged on Earth at least 3.5 billion years ago.[9][10][11]

Answer 2

Answer: It is explained as follows:

Explanation:

The basic biological, structural, and functional components of all living things are cells. A cell is capable of independent reproduction. As a result, they are known as fundamental units of life. Cells comprise all living things. The smallest unit that can sustain life on its own and makes up all living things, including the body's tissues. The three essential parts of a cell are the cell membrane, nucleus, and cytoplasm. The cell membrane, which encloses the cell, controls the movement of substances that can enter and exit the cell. Numerous cell organelles that execute specific tasks in order to carry out life processes make up cells. There is a distinct structure for each organelle. Cells can be of any size or shape. While spherical cells predominate, other forms of cells can sometimes be seen. The majority of cells are microscopic, making it hard to view them with the naked eye. For example  a  neuron in the human body can measure up to one meter in length and  the typical ostrich egg is 15 cm long and 13 cm wide, making it the largest known cell of a living animal.

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