Sexual Reproduction in Flowering Plants Question 53
53. What is the direction of micropyle in anatropous ovule?
(a) upward
(b) downward
(c) right
(d) left
Show Answer
Answer : b
Hints & Solutions
(d) The outermost covering of the pollen grain is made of sporopollenin. Sporopollenin is highly cross-linked polymer composed of carbon, hydrogen, and oxygen that is extraordinarily stable and has been found chemically intact in sedimentary rocks some 500 million years old.
