Important Terms in Biology (Class 11)

Introduction:
Biology is the study of living organisms, including their structure, function, growth, origin, evolution, and distribution. It encompasses a wide range of fields such as genetics, ecology, anatomy, physiology, and microbiology. Here are some important terms in Biology for Class 11.

1. Cell:
A cell is the basic unit of life. It is the smallest structural and functional unit of an organism. All living organisms are made up of one or more cells.

2. Tissue:
A tissue is a group of cells that have a similar structure and function. There are four basic types of tissues in animals: epithelial, connective, muscular, and nervous.

3. Organ:
An organ is a structure composed of two or more tissues that perform a specific function in the body. Examples of organs include the heart, lungs, liver, and brain.

4. Organ System:
An organ system is a group of organs that work together to perform a specific function in the body. Examples of organ systems include the respiratory system, digestive system, and nervous system.

5. DNA:
DNA (Deoxyribonucleic acid) is a molecule that carries genetic information. It is a double-stranded helix structure made up of nucleotides.

6. Gene:
A gene is a segment of DNA that codes for a specific protein or RNA molecule. Genes are the basic unit of heredity and determine an organism's traits.

7. Protein:
Proteins are complex molecules made up of amino acids. They are essential for the structure, function, and regulation of the body's cells, tissues, and organs.

8. Enzyme:
An enzyme is a protein that acts as a catalyst, speeding up chemical reactions in the body. Enzymes are essential for many biological processes such as digestion, metabolism, and DNA replication.

9. Homeostasis:
Homeostasis is the maintenance of a stable internal environment in the body. It is essential for the proper functioning of the body's cells, tissues, and organs.

Conclusion:
These are some of the important terms in Biology for Class 11. Understanding these terms is essential for understanding the basic concepts of biology.