The levels of organization in ascending order are cell, tissue, organ, organ system and organism.

Chlorophyll contained in the chloroplast (a green-colored plastid found only in the plant cell) captures energy from sunlight and helps in the manufacture of food by the process of photosynthesis.

The chloroplast is a green-colored plastid found only in the plant cell. Chlorophyll contained in the chloroplast captures energy from sunlight and helps in the manufacture of food by the process of photosynthesis.

The endoplasmic reticulum consists of tubular structures (convoluted tubules) lying near the nucleus. It provides support to the plant cell and the animal cell. It is of two types, namely the smooth endoplasmic reticulum (does not have ribosomes attached to it) and the rough endoplasmic reticulum (has ribosomes attached to it).

The secretory granule of the animal cell is a vesicular structure. It is formed when the substances produced in the endoplasmic reticulum are further processed in the golgi apparatus of the cell.

The lysosome of the animal cell is a membranous sac budded off from the golgi apparatus, and contains several types of enzymes. It performs intracellular digestion and destroys foreign substances.

The lysosome of the animal cell is a membranous sac budded off from the golgi apparatus, and contains several types of enzymes. It performs intracellular digestion and destroys foreign substances.

The mitochondrion of the plant cell and the animal cell has two layers of membrane, of which the inner one is folded to form cristae. It is the site of ATP (Adenosine triphosphate) synthesis.

The nucleus is the most important part of the plant cell and the animal cell, and contains large amounts of DNA (Deoxyribonucleic acid). It controls and coordinates all the activities and functions of the cell.

The cell membrane is also known as the plasma membrane. It protects the plant cell and the animal cell & regulates the entry and exit of substances, namely ions and solutes.

The ribosome of the plant cell and the animal cell is chiefly composed of RNA (Ribonucleic Acid). It synthesizes proteins.

The ribosome of the plant cell and the animal cell is chiefly composed of RNA (Ribonucleic Acid). It synthesizes proteins.

Xanthophyll contained in the chromoplast (a plastid that imparts color to flowers and fruits, found only in the plant cell) imparts a yellow color to the flowers and fruits of the plant.

Tissue is a group of similar cells performing a specific function. A group of similar tissues performing a specific function constitute an organ.

The cell wall is the outermost covering of the plant cell made up of cellulose, and surrounds the cell membrane. It protects the cell, provides mechanical support and is responsible for maintaining pressure inside the cell.