Calculate the A Hrxn for the theoretical reaction of
C --> 2A+B
Given
C --> B +D
2A-->D
ANirxn = 100 kJ
A Hrxn = -200 kJ

Pollen tube is present in plants and are commonly referred to as style.. They help in carrying pollen grains to the ovary of flower by the process of chemotropism..

Fallopian tube is a part of the female reproductive system which carries the egg from ovary to the site of fertilization.

Hope this helps! :)