angiospermic ovule is
Answers
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Question:
Angiospermic ovule is
Answer:
There are six types of ovules which are formed in angiosperms and the most common type is anatropous ovule.
1. Anatropous ovule
In this type, the body of the ovule becomes completely inverted during the development such that micropyle lies very close to the funicle.
Example:
Gamopetalae members.
2. Orthotropous ovule
The body of ovule is erect and straight such that hilum, chalaza and micropyle lie in straight line.
Example:
Polygonum.
3. Hemitropous ovule
The body of ovule is placed transversely at right angles to the funicle. The micropyle and chalaza lie in one straight line.
Example:
Ranunculus.
4. Campylotropous ovule
The body of ovule is curved and bent round so that the micropyle and chalaza do not lie in the same straight line.
Example:
Leguminosae.
5. Amphitropous ovule
The curvature of the ovule is very much pronounced and the embryo sac also becomes curved.
Example
Butomaceae.
6. Circinotropous ovule
The nucellus and axis are in the same straight line in the beginning but due to rapid growth on one side the ovule becomes anatropous.
Example:
Opuntia.
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Angiosperms: The flowering plants of the Kingdom Plantae are called the Angiosperms. They are the most diverse group of terrestrial- habitat plants. They are seed-producing plants.
Monocotyledons: The monocotyledons, also referred to as monocots. They are flowering plants or Angiosperms, which produce seeds containing only one cotyledon. Legumes are the best examples of monocotyledons.
Dicotyledons: The dicotyledons, also referred to as dicots. They are flowering plants or Angiosperms, which produce seeds containing two cotyledons. Grains are the best examples of dicotyledons