Why reproduction in seed plants (spermopsids)is not dependent upon water?
please explain!
is there any more clear explanation i can get? ! this is not helping :(
thanks Btw
Try these sites.
http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20102/Bio%20102%20lectures/Seed%20Plants/seed%20plants.htm
http://www.mansfield.ohio-state.edu/~sabedon/campbl30.htm
Thank you so much !
You're very welcome.
Reproduction in seed plants, or spermopsids, is not dependent upon water due to the presence of two key reproductive adaptations: the production of pollen and the development of seeds.
1. Pollen production: Seed plants produce tiny structures called pollen grains, which contain the male reproductive cells (sperm). These pollen grains are extremely lightweight and can be carried by wind, insects, or other animals to reach the female reproductive structures of the plant, known as the ovules. This allows for the transfer of male gametes from the pollen to the ovule, without the need for water as a medium for transportation.
2. Seed development: After the transfer of pollen to the ovule, fertilization occurs, where the male and female gametes combine to form a zygote. Unlike in non-seed plants, this zygote develops into an embryo within the ovule, which is protected by a seed coat. The seed coat provides a protective covering and allows for the embryo to survive under adverse conditions, such as drought or extreme temperatures. This adaptation enables seed plants to disperse their offspring to different locations without relying on water for dispersal, as water-dependent plants do.
Overall, the production of pollen and the development of seeds in seed plants are two significant evolutionary adaptations that allow for reproduction without the dependence on water as a medium for both gamete transfer and dispersal of offspring.