Question

What is the structural and functional unit of living organisms?
a. Tissue
b. Cell
c. Organ
d. None of these

Answer 1

Hint: Unicellular organisms can function independently, but the cells of multicellular organisms are dependent upon one another and are organized into five different levels to coordinate specific functions and do all of life’s biological processes. These are cells, tissues, organs, organ systems, and organisms.

Step by step answer:Single-celled organisms perform all the fundamental processes of life however, it has to be organized for performing all essential processes. Hooke used a lightweight microscope and discovered cells within the year 1665. After this discovery, it had been concluded that altogether life forms i.e., bacteria, plants, animals, and humans, cell acts as a basic structural and functional unit. All cells are organized from the atomic level to all or any of its larger forms. Molecules bond together to form bigger macromolecules. The atom is commonly spoken because of the backbone of life because it can readily bond with four other elements to create long chains and more complex macromolecules.
The cell is the basic unit of life and is structurally and functionally complex. A cell has numerous
organs called organelles. Organelles are structural and functional units built up by the addition of several
macromolecules. A typical animal cell contains a nucleus, mitochondria, ribosomes, the endoplasmic
reticulum, Golgi body, lysosomes, and peroxisomes, which break down macromolecules and destroy
foreign invaders. All of the organelles are anchored within the cell’s cytoplasm via a cytoskeleton. The
cell’s organelles are isolated from the encircling environment by a cell wall.
Therefore, the correct option is b, cell

Note: Energy is required so as to create molecules into larger macromolecules and to show macromolecules into organelles and cells, so turn those into tissues, organs, and organ systems, and eventually into an organism. Proper nutrition provides the required nutrients to create energy that supports life’s processes. The body builds new macromolecules from nutrients in food.