Answers

2016-03-16T13:34:21+05:30
Because an uninterrupted sequence of fossilized pollen from flowers begins in the Early Cretaceous, approximately 140 million years ago, it is generally assumed that flowering plants first evolved around that time.
0
2016-03-16T14:12:14+05:30
Pollen grains are considered as fossils as they helped the scientist to find that flowering plant were existed in those days
0