
The Gymnosperm
Hi viewers
Today we will discuss about the Gymnosperm.
Basically, Gymnosperms are eukaryotic plants, which have naked seed and fertilization takes place after one year of fertilization.
PROPERTIES GYMNOSPERM
They are eukaryotic in nature
They are autotrophic
Roots,stem and leaf are distinct
Woody stem and xylem are present
Naked seeds are present
Spiny leaves are present
Fertilisation takes place after one year of pollination
Male cone and female cone are present
They are evergreen and perennial
Eg. Pinus and Cycas, etc.
1. Name one gymnosperm where xylem vessels and companion cells are present. (1)
Ans. Gnetum
2. Differentiate between bract scale and ovuliferous scale. (2)
Bract scale
Ovuliferous scale
1. They are located at the base of the microsporophyll.
2. They have a membranous structure.
3. They protect the base of the megasporophyll and provide their attachment with the axis.
1. They are the upper lateral projections of the megasporophyll.
2. They have a more woody structure.
3. They provide support and protection to the ovules.
Differentiate between endosperm of gymnosperm and endosperm of...