Multiple Type Choice Questions [ Cell ]

Cells are referred to as the "Building Blocks of life" because they are the basic structural and functional units of all living organisms. They are responsible for carrying out essential life processes such as growth, reproduction, and metabolism. Cells can exist as single-celled organisms or as part of complex multicellular organisms, forming tissues, organs, and systems. They are the fundamental units that make up all living organisms and are crucial for the maintenance and survival of life.

Mitochondria are often referred to as the "powerhouse of the cell" because they are responsible for generating energy in the form of ATP through cellular respiration. They contain their own DNA and can reproduce independently within the cell. This organelle plays a crucial role in providing energy for various cellular processes and is essential for the overall functioning of the cell.

The cell is considered the structure and functional unit of life because it is the smallest unit of an organism that carries out all the necessary functions for life. Cells are responsible for processes such as metabolism, reproduction, and response to stimuli. They are also capable of growth and development. Tissues, organs, and organ systems are all made up of cells, making them the building blocks of life.

A group of cells is called tissue. Tissue refers to a collection of similar cells that work together to perform a specific function in the body. Tissues can be found in various organs and structures throughout the body and are categorized into four main types: epithelial tissue, connective tissue, muscle tissue, and nervous tissue. Each type of tissue has its own unique characteristics and functions, contributing to the overall functioning and maintenance of the body.

Prokaryotes are single-celled organisms because they lack a true nucleus and membrane-bound organelles. They are simple, unicellular organisms that do not have complex structures like tissues or organs. Prokaryotes include bacteria and archaea, which are characterized by their small size and ability to survive in various environments. They reproduce asexually through binary fission and play important roles in various ecological processes such as nutrient cycling and decomposition.

Robert Hooke is credited with discovering the cell. In 1665, he observed and described the structure of cork under a microscope, noting small compartments that he called "cells" due to their resemblance to the cells of a monastery. Hooke's discovery laid the foundation for the field of cell biology and revolutionized our understanding of the microscopic world.

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Schleiden and Schwann proposed the cell theory. The cell theory states that all living organisms are composed of cells, cells are the basic unit of structure and function in living organisms, and cells come from pre-existing cells. Schleiden, a botanist, concluded that plants are made up of cells, while Schwann, a zoologist, extended this idea to animals. Together, they formulated the cell theory, which revolutionized our understanding of biology and laid the foundation for modern cell biology.