Angiosperm

Angiosperm

Hi viewers Today we are going to discuss about the The Angiosperms. Angiosperms are eukaryotic flower producing fruit producing plants. They may be May be herb, shrub and tree or may be annual, biennial and perennial type PROPERTIES ANGIOSPERM They are eukaryotic in nature They are autotropic Roots,stem and leaf are distinct Xylem and phloem are present Seeds are covered with fruits Fertilisation takes place after few days of pollination Leaves are of various types Flowers are of various types Mango,Coconut, etc. 1.   State five distinctive features of angiospermic plants. (3) Ans. i) Presence of flowers. ii) Formation of fruit. iii) Pollen grains are borne in anther. iv) Existence of double fertilization. v) Formation of triploid endosperm after fertilization. 2.  What are angiosperm and phanerogam? (1+1) Ans. a) The angiosperms are the highest evolved vascular plant producing flowers and fruits. b) All flowering plants are called phanerogams. 3.   Name three structures absent in dicot seed. (1) Ans. Coleoptile, coleorhiza and scutellum 4.  Name a nonendospermic monocot plant. (2) Ans. Arum 5. Name the fruit where fruit coat and seed coat...
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The Gymnosperm

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...
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