Wednesday, February 4, 2009

Hornworts




Characteristics:
-Hornworts are a bryophyte, nonvascular, seedless plant.
-They are most likely to be found in the Northern Hemisphere in moist soil, or upon tree bark.
-An adaptation of there is that gametophytes are longer-living than sporophytes in their life-cycle.
Development and Life Cycle:
Once fertilization occurs the bryophyte is in the diploid stage and a zygote forms. The embryo grows to become a female gametophyte.
It releases sporangium, which are in the haploid stage.
They then develop into a male or female gametophyte and the male fertilizes the female, closing the life cycle of the bryophyte.

Examples:


-An image of anthoceros.

-An image of a Hornwort.

These can be found on trees and moist soil.