Question

Which of the following statements is incorrect about growth?

• A. In multicellular organisms growth takes place by cell division.
• B. Unicellular organisms do not grow by cell division.
• C. In plants growth is a continuous process whereas in animals, growth occurs only upto a certain age.
• D. Growth is characterized by increase in number and mass.

Answer 1

The correct option is B Unicellular organisms do not grow by cell division.

All living organisms undergo growth and development. In unicellular organisms growth and reproduction both occur by cell division. Unicellular organisms begin their life as a single cell and remain as a single cell throughout their life. The unicellular organism grows by the mitotic division only e.g. binary fission in Amoeba. The multicellular organisms also begin their life as a single cell but they divide mitotically and form tissues then organs, organ systems. Growth is characterized by increase in number and mass. In plants growth is a continuous process whereas in animals, growth occurs only upto a certain age.