ICSE Class 9 Biology — Flashcards

A: Science is an organised body of knowledge supported by observation and experimentation, derived from the study of natural phenomena of the entire material universe.

A: Biology is the study of living beings, including all plants and animals, and humans. It is also called the study or science of life.

A: Biology is sometimes called Life Science because it focuses on life and life processes in living organisms.

A: A cell is the fundamental structural and functional unit of all living beings. It is the smallest part of an organism capable of independent existence and performing the essential functions of life.

A: Cells are microscopic and cannot be seen with the naked eye. Microscopes made it possible to observe cells and discover their structure.

A: A simple microscope is a microscope with a single biconvex lens. Antony van Leeuwenhoek used this type of microscope.

A: A tissue is a group of similar cells performing a specific function. Tissue helps cells work together, just as a team works better than a single worker.

A: Several tissues together form an organ. Many organs working together form an organ system. Organ systems together form an organism. Example: different tissues in the tongue make an organ, and the dige

A: Plant tissues are of two main types: meristematic tissue and permanent tissue. Meristematic tissue has cells that can divide and form new cells. Permanent tissue has cells that have lost the ability t