Biology

No living cell can survive without water and water constitutes 90% portion of a cell’s protoplasm. This is why protoplasm is called the physical basis of life.

Plasmodesmata are microscopic tube-like channels that connect adjacent cells.

Cells that do not have any well-developed nucleus are known as prokaryotic cells.

Skeletal tissue constitutes the structural framework of the animal body, holds the muscles, and protects the internal organs from injury. The brain is the most sensitive and important part of the body of vertebrate animals. So, its protection demands the highest importance. There is a cover made up of hard bones around the brain known … Read more

The tissue having the capacity of contraction and expansion is known as muscle tissue. It originates from the mesoderm of the embryo and regulates the movement of the organs and the organism. The cells of muscle tissue are elongated and myofibrils are present in them. Matrix generally remains absent in this tissue.

The coloured organelles present within the cytoplasm of plant cells are known as plastids. They are responsible for the formation of color of any plant part like leaves, flowers, and fruits. In absence of light plastids are known as leucoplasts become colorless. The colorless plastids are known as leucoplasts generally present in the cell of … Read more

The protoplasm of the living cell remains surrounded by a bi-layered selectively permeable membrane known as plasmalemma or cell membrane. “Plasmalemma” is another, less common term for the cell membrane or plasma membrane. It functions as the outermost boundary of all living cells, separating the interior (cytoplasm) from the external environment. Here’s a closer look … Read more

Steps or ranks of classification: Kingdom   Phylum/Division     Class       Order        Family         Genus          Species