Question

Organic substances which regulates the growth of plants are called

• A. Plant hormones / Phytohormones
• B. Plant enzymes
• C. Plasma membrane
• D. None of these

Answer 1

The correct option is A Plant hormones / Phytohormones

• Plant hormones/phytohormones are numerous organic chemical substances that control the growth and differentiation of plant cells, tissues, and organs.
  
• Plant enzymes are both organic and inorganic nature. They are not involved in the regulation of growth directly.
  
• The plasma membrane regulates the transport of materials entering and exiting the cell. so option A is the correct answer.