Question

Plant hormone is also known as___________________

• A. Planktohormone
• B. Phytohormone
• C. Photohormone
• D. All of the above

Answer 1

The correct option is B Phytohormone

• Plant hormones are also known as phytohormones, they are chemicals that regulate plant growth.
• Plant hormones are signal molecules produced within the plant and occur in extremely low concentrations.
• Hormones regulate cellular processes in targeted cells locally and, moved to other locations, in another functional part of the plant.

Hormones also determine the formation of flowers, stems, leaves, the shedding of leaves, and the development and ripening of fruit. The term 'Phytohormone' was coined by Thimann in 1948.

Therefore, the correct answer is option B.