Reproduction and Development Ii (Plants) Flashcards
Involves no union of cells or nuclei of cells and, therefore, no mingling of genetic traits, since the nucleus contains the genetic material (chromosomes) of the cell.
Asexual Reproduction
Asexual Reproduction (Specialized Plant parts)
*Stolon
*Rhizome
*Tuber
*Corm
*Bulbs
Particularly found in the sporophyte generation of bryophytes and earlier tracheophytes.
Sporogenesis
Throughout the history of life, plant life have undergo adaptations and successful evolutions which could be observed in their reproduction and development.
Reproduction and Development
Classification of Plants ( Bryophytes/Nonvascular Plants )
*Moss
*Hornwort
*Liverwort
Classification of Plants ( Tracheophytes/Vascular Plants )
Seedless
*Lycophyte
*Monilophytes
Seed plants
*Gymnosperm
*Angiosperm
also called metagenesis or heterogenesis, is the alternation of a sexual phase and an asexual phase in the life cycle of an organism. The two phases, or generations, are often morphologically, and sometimes chromosomally, distinct.
Alteration of Generations
The sexual phase, called the gametophyte generation, produces gametes, and the asexual phase, or sporophyte generation, produces spores asexually.
Alteration of Generations
Five derived Traits of Seed Plants
*Reduced Gametophytes
*Heterospory
*Ovules
*Pollen
*Seeds
Microscopic male and female gametophytes (n) are nourished and protected by the sporophyte (2n)
Reduced Gametophytes
gives rise to a male gametophyte (Heterospory)
Microspore
gives rise to a female gametophyte (Heterospory)
Megaspore
Ovule (gymnosperm)
Integument (2n)
Megaspore (n)
Megasporangium (2n)
______ grains make water unnecessary for fertilization
Pollen
Survive better than unprotected spores, can be transported long distances
Seeds
