Question
Biology Question on sexual reproduction in flowering plants
Growth of pollen tube towards embryo sac is in example of
A
geotropism
B
thigmotaxis
C
chemotaxis
D
all of these
Answer
chemotaxis
Explanation
Solution
Tube formed on germination of a pollen grain is called pollen tube. It grows towards the egg along a chemical gradient i.e. chemotaxis. Chemotaxis is the movement of a cell, or a microorganism in response to a chemical stimulus.