When a sound is reflected from a distant object, an echo is produced . Let the distance between the reflecting surface and the source of sound production remain the same . Do you hear an echo sound on a hotter day?

The cell theory states that

• A. All cells have nuclei.
• B. All cells are totipotent.
• C. Cells reproduce by mitosis.
• D. Cells are the basic structural units of living beings.

List the point of difference between Homogeneous and Heterogeneous mixtures

Turmeric is a natural indicator. On adding its paste to acid and base separately, which color is observed?

A. yellow in both acid and base

B. yellow in acid and red in the base

C. Pink in acid and yellow in the base

D. Red in acid and blue in the base.

Which is the smallest organ in the Body?

Who is called the father of Ayurveda?