Question

DEFINE THE FOLLOWING.

Pollen grain
Stigma
Male gamete
Pollen tube
Ovule
Female
gamete
(Egg
male gamete
Zygote
(Fertilized
egg)
Ovary
Fertilization in a flower

good evening. Can anyone help me please with answering the correct definition .​

Answer 1

Answer:

pollen tube is a tubular structure produced by the male gametophyte of seed plants when it germinates. Pollen tube elongation is an integral stage in the plant life cycle. The pollen tube acts as a conduit to transport the male gamete cells from the pollen grain—either from the stigma (in flowering plants) to the ovules at the base of the pistil or directly through ovule tissue in some gymnosperms. In maize, this single cell can grow longer than 12 inches (30 cm) to traverse the length of the pistil.

Pollen tubes were first discovered by Giovanni Battista Amici in the 19th century.

They are used as a model for understanding plant cell behavior. Research is ongoing to comprehend how the pollen tube responds to extracellular guidance

Answer 2

Answer:Here I'm same as u

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