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Now those all-important flights that meant the difference between staying in the race or being eliminated may register as germ tubes, and yet another reminder of something we still can't do.

Insects pollinate flowers by depositing pollen on the stigma, whence the pollen grains germinate and send out germ tubes that travel down the style to the ovary.

The oospore on germination usually gives origin to a zoosporangium, but may form directly a germ tube which infects the host.

The germ tube is rather smaller at its base than further on.