Question

what is angiosperms and gymnosperms? #Class 11​

Answer 1

$\small\orange {\sf{Bonjour\ Mate!}}$

☆$\small\green {\sf{Answer }}$☆

• A seed is produced by flowering plants and is enclosed within an ovary
• A seed is produced by non-flowering plants and are unenclosed or naked.
• The lifecycle of these plants are seasonal
• These plants are evergreen
• Has triploid tissue
• Has haploid tissue
• Leaves are flat in shape Leaves are scalelike and needle-like in shape
• Hardwood type Softwood type

Answer 2

$\mathcal{\huge{\underline{\underline{\red{Answer:-}}}}}$

Gymnosperm :-

• In gymnosperm the reproductive structure are cones which are uni-sexual
• The ovules are exposed, i.e. , they are not located in ovary..
• After fertilization, the ovules develop into naked seeds.
• The microscopes & megaspores are produced by male & female cones.
• The pollen grain falls and germinate directly on the microply of the ovules.
• Fertilization is simple.
• Endosperm is haploid.
• In gymnosperm the pollination is by wind alone.
• In gymnosperm,generally the xylem contain only tracheids,vessels are absent.
• The phloem has no companion cells.

Angiosperm :-

• In angiosperm,the flowers are the reproductive organ & they may be both unisexual & bisexual.
• The ovules are enclosed in the ovary.
• After fertilization, the ovules develop into seeds inside the fruit.
• The microspores are produced in anther while the mega-spores are produced in ovules in the ovary in flowers.
• The pollen grains falls on the stigma, germinate and the pollen tube carries the male gamete to the ovary.
• Fertilization is double.
• Endosperm is triploid.
• In angiosperm, different agents like winds,insects, bats etc.are envolved in pollination.
• Angiosperm vessels are always in present.
• Companion cells are present.

_______________________________