Q. 3

Name a hormone which

a. is gaseous in nature

b. is responsible for phototropism

c. induces femaleness in flowers of cucumber

d. is used for killing weeds (dicots)

e. induces flowering in long day plants

Answer :

Hormone which


a. is gaseous in nature: ethylene


Ethylene is a small hydrocarbon gas which is an ageing hormone in different plants. It causes ripening of fruits as well as has growth inhibitory functions.


b. is responsible for phototropism: auxin


Presence of auxins is responsible for plant response to light intensities. Plant cells further away from the light has more auxin thus grows faster aiding bending of the stem towards the light source.


c. induces femaleness in flowers of cucumber: ethylene


Ethylene induces flowering so can be used to increase the number of female flowers in the cucumber plants. It selectively induces flowering of female plants suggesting a link between ethylene signalling and primordial anther specific DNA damage in female cucumber flowers.


d. is used for killing weeds (dicots): auxins


Auxin growth regulator herbicides are used for controlling annual, simple perennial etc. They are selective and is widely used to kill dicotyledonous weeds whereas not affecting mature monocotyledonous plants.


e. induces flowering in long day plants : Gibberellin


Usually after gibberellin is applied to long-dayplants, stem elongation occurs before flower primordia are formed.



Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Interactive Quiz on Plant Growth and DevelopmentInteractive Quiz on Plant Growth and DevelopmentInteractive Quiz on Plant Growth and Development53 mins
Interactive Quiz on Plant Growth {Rapid Fire}Interactive Quiz on Plant Growth {Rapid Fire}Interactive Quiz on Plant Growth {Rapid Fire}45 mins
Interactive Quiz on Respiration in PlantsInteractive Quiz on Respiration in PlantsInteractive Quiz on Respiration in Plants53 mins
Interactive Quiz on AlgaeInteractive Quiz on AlgaeInteractive Quiz on Algae32 mins
Secondary growthSecondary growthSecondary growth51 mins
Interactive Quiz on Secondary GrowthInteractive Quiz on Secondary GrowthInteractive Quiz on Secondary Growth54 mins
NCERT Exemplar Special | Plant Kingdom Part 2NCERT Exemplar Special | Plant Kingdom Part 2NCERT Exemplar Special | Plant Kingdom Part 224 mins
Features, similarities and dissimilarities between bryophytes and pteridophytesFeatures, similarities and dissimilarities between bryophytes and pteridophytesFeatures, similarities and dissimilarities between bryophytes and pteridophytes51 mins
NCERT Exemplar Special | Plant Kingdom Part 1NCERT Exemplar Special | Plant Kingdom Part 1NCERT Exemplar Special | Plant Kingdom Part 118 mins
Interactive Quiz on Plant PhysiologyInteractive Quiz on Plant PhysiologyInteractive Quiz on Plant Physiology54 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :