Explanation

Meiosis is a type of cell division that reduces the chromosome number by half and is essential for the formation of germ cells (sperm and egg).

It ensures genetic diversity.

It is fundamental to sexual reproduction.

Explanation

The ostrich egg is the largest cell in the animal kingdom.

It can weigh up to 1.4 kg.

Explanation

Skin cells form the outermost layer of the body, acting as a protective barrier.

They shield internal organs and tissues from injury, pathogens, and dehydration.

Explanation

DNA is the fundamental molecule that carries genetic information, forming the basis of heredity alongside chromosomes and genes.

It is the hereditary material in almost all organisms, encoding the instructions for building proteins and other important molecules.

Explanation

The nucleus is the control center of the cell, regulating all cellular activities, including growth and reproduction.

It contains the cell’s genetic material (DNA).

Explanation

Red blood cells (RBCs) are primarily responsible for transporting oxygen from the lungs to various tissues in the body.

They contain a protein called hemoglobin, which binds to oxygen molecules, facilitating their transport.

Explanation

Amoeba, Euglena, and Paramecium are all unicellular organisms.

They consist of a single cell that performs all the functions necessary for survival, such as movement, reproduction, and obtaining nutrients.

Explanation

The lifespan of a red blood cell is around 120 days.

Blood cells are made in the bone marrow.

Explanation

DNA (Deoxyribonucleic Acid) has a double helix structure,

which consists of two long strands of nucleotides twisted around each other.

This structure was discovered by James Watson and Francis Crick in 1953.

Explanation

Chemical energy is stored in a dry cell.

A dry cell is a device that converts chemical energy into electrical energy.

Chemical energy is the energy stored in the bonds of atoms and molecules.