Ilewop
Cannabis actually has two kinds of trichomes, glandular and non-glandular. The non-glandular trichomes are the really small hairs all over the plant, they often make the stem of a young plant look sort of white. These hairs are modified epidermal cells that restrict water loss from the plants stomatal pores, playing a key role in regulating the plants internal temperature.
The second kind of trichome is what the OP is asking about. These are also modified epidermal cells, that function to secrete resin. It has been suggested that this resin is not to capture pollen, but as stated in an earlier post to attract pollinators. This is justified by the fact that resin is not need for pollination since most plants do not have any resin on their pistils, yet they are able to reproduce just fine. The idea that resin does play a key role in pollination is shown in an unpollinated female that will continue to produce more resin towards the end of its flowering phase, yet halt resin production if germinated.
Perhaps one of the best points made. Am I off base to say that a plant loaded with seeds is much less resinous than one grown non-pollinated? Does not a non-pollinated flower produce more and more resin (to a point)? This seems to indicate some relationship with the plants 'efforts' to become pollinated as she becomes smellier and stickier.
VG: I too have noticed that flies are attracted to the flowers.
mriko
Wind is the pollinator. Resin would rather attract animals for them to feed on seeds and help spread them more or less far away from the mother plant. Animals too like to get high...
Maybe wild cats...cats love cannabis.
Maybe because man has bred modern chickens for egg production or meat production but not for flying? I am sure all the original wild chickens ancestors that modern chickens are derived from did fly maybe even good flyers, but man would prefer non flyers that were easier to keep domesticated. As well as mans focus on meat or egg production over flying ability.
-SamS
I'm sure the higher resin content results from man's hand but originally resin is likely produced for some role in seed production. That's what its all about from a plant's perspective.
BTW, I had an old race of chickens about 35 years ago that flew quite well. They roosted in the trees where I lived in the forest.