In this species, gametes are produced on different plants on umbrella-shaped gametophores with different morphologies.
The radiating arms of female gameteophores (left) protect archegonia that produce eggs.
And that's exactly what I was hoping for when I heard about Sex Week at Yale—lots of theory, lots of abstraction, lots of intellectual distance.
I heard about Sex Week last year in the following press release, forwarded to me by e-mail: I'm coordinating a huge event for Yale University which is titled "Campus-Wide Sex Week." Four organizations are organizing the event: Yale Hillel, Peer Health Educators, the Women's Center, and the Yale Lesbian, Gay, Bisexual, Transexual Cooperative ...
When Is-male feels a chill in his romantic life, he does something similarly funereal: he tries to give the whole thing the long good-bye.
After all, Is-male reasons, he's had more than his fair share of exhilarating encounters—a marriage here, a divorce there—and more than his fair share of misery and heartbreak as well. Style himself after the romantically embittered and disillusioned Graham Greene heroes who trudge off to leper colonies to lose their worldly desires?
Among all living organisms, flowers, which are the reproductive structures of angiosperms, are the most varied physically and show a correspondingly great diversity in methods of reproduction.
Plants that are not flowering plants (green algae, mosses, liverworts, hornworts, ferns and gymnosperms such as conifers) also have complex interplays between morphological adaptation and environmental factors in their sexual reproduction.
Christian Konrad Sprengel (1793) studied the reproduction of flowering plants and for the first time it was understood that the pollination process involved both biotic and abiotic interactions.
Aquest article descriu els aspectes morfològics de la reproducció sexual en les plantes.
Entre tots els organismes vius, les flors, les quals són l’estructura reproductiva de les angiospermes, són les més físicament variades i mostren la major diversitat de mètodes de reproducció de tots els sistemes biològics.
Charles Darwin's theories of natural selection utilized this work to build his theory of evolution, which includes analysis of the coevolution of flowers and their insect pollinators.
Dioicous gametophytes of the liverwort Marchantia polymorpha.
Carolus Linnaeus (1735 i 1753) proposà un sistema de classificació de les plantes amb flors basat en l’estructura de les plantes, com que les plantes empren moltes adaptacions morfològiques diferents que impliquen la reproducció sexual, les flors juguen un paper important en aquell sistema de classificació.