Biology Quiz for Class 9 CBSE

What is the basic structural and functional unit of life?

• atom

• cell

• molecule

• organism

Which organelle is known as the powerhouse of the cell?

• Ribosome

• Nucleus

• Mitochondria

• Endoplasmic Reticulum

What is the genetic material found in the nucleus of a cell?

• DNA

• Lipid

• RNA

• Protein

Name the process by which green plants make their food.

• Respiration

• Photosynthesis

• Chlorophyll

• Transpiration

What is the study of the relationship between living organisms and their environment called?

• ecology

• astronomy

• geology

• biology

Who is known as the father of genetics?

• Albert Einstein

• Isaac Newton

• Marie Curie

• Gregor Mendel

Which human body system is responsible for the exchange of gases?

• Circulatory system

• Nervous system

• Digestive system

• Respiratory system

What is the process by which organisms adapt to their environment over time?

• Artificial selection

• Genetic drift

• Natural selection

• Mutation

Which plant hormone is responsible for phototropism?

• Gibberellin

• Auxin

• Abscisic acid

• Cytokinin

What is the process of formation of new species over time known as?

• Mutation

• Adaptation

• Evolution

• Speciation