Length of pollen tube depends on the distance between_________
A. pollen grain and an upper surface of the stigma
B. pollen grain on the upper surface of stigma and ovule
C. pollen grain in anther and the upper surface of the stigma
D. the upper surface of stigma and lower part of style
Answer:B
Length of pollen tube depends on the distance between_________
A. pollen grain and an upper surface of the stigma B. pollen grain on the upper surface of stigma and ovule C. pollen grain in anther and the upper surface of the stigma D. the upper surface of stigma and lower part of style