0 Members and 1 Guest are viewing this topic.
quote:Originally posted by ukmicky maybe your question should be... what came first colour or fragranceMichael HAPPY NEW YEAR
quote:Originally posted by DoctorBeaverWheat a minute... you altered it. I'd grass you up but I don't want us to become anemones! [:I]
quote:Originally posted by ukmickyWell the plant came first and the first plants must of had some form of colour. but the insects must have appeared before the plants evolved a way to use them to spread pollen.Also some of the insects which pollinate plants are colourblind and are attracted by fragrance .
quote:Originally posted by neilepSetting aside my mindless drivel.....I understand that flowers procreate by being well sexy in insects eyes...they achieve this by displaying lurid insect arousing colours (the sexy heathen come-hither floral temptresses !!) and offering juicy pollen and fragrant stuff !!...so...(finally)....which came first ?...the colour , the fragrance ? or the insect ?....... to make naughty symbiotic fun.
quote:Originally posted by neilepsorry for crude pun...I get like that after 40 hours of wakeful elation !
quote:Originally posted by neilepThank you another_someone.I was kind of jesting about the interspecies sex thing !!...but from your post above...it seems the insect came first !!..premature insectulation !! (sorry for crude pun...I get like that after 40 hours of wakeful elation !)thanksNeilps: In fact I'm surprised Eth didn't know that about the early insects..after all...he was there !! Men are the same as women.... just inside out !!
quote:ORIGINALLY POSTED BY ANOTHER_SOMEONETotally untrue (at least as far as land plants are concerned).Animals colonised the land some considerable time before plants did. Flowering plants came very much later yet.True, algae came before either, and they certainly had colour, in the case of blue-green algae (the first life to invent photosynthesis), the colour is self explanatory.
quote:Originally posted by ukmickyNo I'm afraid your wrong. I agree the Pollen-bearing plants don't appear in the fossil record until later, but plant life on land didnt start with them.what do you think the animals had for lunch ,if you check out the Fossil evidence you will see that plants populated the land a long time before animals, the first land animals the arthropods didnt come out of the water until there were enough plants/food to make it worthwhile.The Insects evolved from these first amphibious arthropods that vetured out to eat the already establised plants.
quote:The oldest body fossil of a land animal is a 430-million-year-old millipede from Scotland. Body fossils are extremely rare from this time in Earth history, but there is another source of evidence that supplies clues to when ancient life first stepped out of the sea A few years ago there was a ground-breaking discovery in a quarry near Kingston, Ontario in Canada. Fossilised trackways, preserved in a coastal dune deposit, revealed that arthropods first conquered the land around 500 million years ago, some 50 million years earlier than we previously thought.
quote:Nevertheless, from the earliest inter-tidal vegetation of the Silurian Period (425 million years ago), plants progressively became established on land, and eventually developed into the lush tropical wetland forests of the Late Carboniferous Period (300 million years ago).
quote:The Silurian is a major division of the geologic timescale that extends from the end of the Ordovician period, about 443.7 Ma (million years ago), to the beginning of the Devonian period, about 416.0 Ma (ICS 2004). The first fossil records of vascular plants, that is, land plants with tissues that carry food, appeared in the Silurian period.
quote:The earliest vascular land plants appeared about 425 million years ago in the late Early Silurian. This form, Cooksonia, consisted of small naked, dichotomously bifurcting axes bearing terminal sporangia. These plants were only a few centimeters high. Baragwanathia is a much more robust plant consisting of up to 30 cm long axes with spirally arranged leaves and it has been described from the Upper Silurian of Australia; unfortunately, the quality of the compressions is rather poor and no organic material is preserved. The Early Devonian is characterized by a very strong radiation of land plants. Four major groups can be distinguished: the Rhyniophytes, the Zosterophyllophytes, the Lycopods and the Trimerophytes. The Rhyniophytes are definitely among the best known land plants.
quote:These changes center on the emergence and diversification of semi-aquatic and terrestrial tracheophytes (vascular plants). Fossil spores belonging to bryophytes (nonvascular plants such as liverworts and mosses) are known from as early as the Middle Ordovician. The trilete spores of pre-trachaeophytes first occur in the late Early Silurian as does the famous early fossil plant Cooksonia. These and other early plants, which are referred to as the rhyniophytes, diversify from the late Silurian through the Middle Devonian into the two major trachaeophyte clades: lycophytes (barinophytes, zosterophyllophytes and lycopsids) and euphyllophytes (trimerophytes, ferns, sphenopsids, progymnosperms, and seed plants).
quote:The Ordovician period started at a minor extinction event, possibly caused by a gamma ray burst, some time about 488.3 million years ago (mya) and lasted for about 50-80 million years. It ended with a major extinction event about 443.7 mya (ICS, 2004) that wiped out 60% of marine genera. In North America and Europe, the Ordovician was a time of shallow continental seas rich in life. Trilobites and brachiopods in particular were rich and diverse. The first bryozoa appear in the Ordovician as do the first coral reefs. Solitary corals date back to at least the Cambrian. Molluscs, which had also appeared during the Cambrian, become common and varied, especially bivalves, gastropods, and nautiloid cephalopods. It was long thought that the first true vertebrates (fish - Ostracoderms) appeared in the Ordovician, but recent discoveries in China reveal that they probably originated in the early Cambrian. Now-extinct marine animals called graptolites thrived in the oceans. Some cystoids and crinoids appeared. The first terrestrial plants appeared in the form of tiny plants resembling liverworts.
quote: suspect we are both a little right and a little wrong.
quote:Originally posted by another_someoneFirstly, as I understand it, plants don't look sexy to insects, they look like food – which is what they provide to insects – I am not aware of any insect that tries to mate with a plant.