in Plant Reproduction by

1 Answer

0 votes
by

The pollen grains are circular in shape and have highly modified, spiked exine. The pollen grains are 3-4 colporate and the spines are sometimes branched.

Biology Questions and Answers for Grade 10, Grade 11 and Grade 12 students, Junior and Senior High Schools, Junior Colleges, Undergraduate biology programs and Medical Entrance exams.
...