Home
Class 12
BIOLOGY
Phytohormones are...

Phytohormones are

A

chemicals regulating flowering

B

chemicals regulating secondary growth

C

hormones regulating growth from seed to adulthood

D

regulators synthesised by plants and influencing physiological processes

Text Solution

Verified by Experts

The correct Answer is:
D

Phytohmmones (Thirnann, 1948) are the plant hormones , i.e. the organic substances which are naturally produced in plants, control the growth or otner physiological function at a site away from thier place of synthesis and active in extremely minute quantities
Promotional Banner

Topper's Solved these Questions

  • PHOTOSYNTHESIS IN HIGHER PLANTS

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise MCQs|74 Videos
  • PLANT KINGDOM

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise MCQ|107 Videos

Similar Questions

Explore conceptually related problems

Phytohormones resposible for cell division in callus are ____ and _____.

Which of the following type of phytohormones resemble the nucleic acids in some struc- tural aspects

Which of the following phytohormones replaces female flowers with female flowers on monoecious plants of cucurbits ?

Phytohormones promoting sprouting of potato tuber,chloroplast formation in leaves and xylem differentiation respectively are

How many of the following statements are not correct? [I] In a flowering plant the substances that would need to be transported are water, mineral nutrients, organic nutrients and plant growth regulators. [II] Over small distances, substances move by diffusion and by cytoplasmic streaming supplemented only by passive transport. [III] Organic and mineral nutrients undergo multidirectional transport through the xylem. [IV] From the storage organs, organic compounds are later re-exported. [V] Phytohormones and other chemical signals are transported to maintain and regulate the plant functions.

A phytohormone, responsible for closure of stomata is

Phytohormone A causes apical dominance while phytohormone B overcomes the same. Select the option that correctly identifies A and B.

Which phytohormone is responsible for hedge making?

Which of the following phytohormone is a derivative of carotenoids?

Phytohormone that helps seeds to withstand desiccation and other unfavourable conditions is