wiz-icon
MyQuestionIcon
MyQuestionIcon
2
You visited us 2 times! Enjoying our articles? Unlock Full Access!
Question

The growth of pollen tubes towards ovules is due to

A
Hydrotropism
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Chemotropism
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Geotropism
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Phototropism
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A Chemotropism

Chemotropism is the growth of organisms such as bacteria and plants, with the help of a chemical stimulus from outside of the organism or from organism's part. The response of the organism is termed 'positive' if the growth is towards the stimulus or 'negative' if the growth is away from the stimulus. An example of chemotropic movement can be seen during the growth of the pollen tube, where growth is always towards the ovules. Fertilization of flowers by pollen is achieved because the ovary release chemicals that produce a positive chemotropic response from the developing pollen tube. Therefore, the correct answer is option B.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon