Question:
An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is
An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is
Updated On: Jun 23, 2024
Campylotropous
Anatropous
Orthotropous
Hemitropous
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The Correct Option is D
Solution and Explanation
A hemitropous ovule is an ovule that becomes curved, positioning the nucellus and embryo sac at a right angle to the funicle. In this type of ovule, the body of the ovule is oriented transversely, with the micropyle and chalaza aligned in a straight line. An anatropous ovule is one that is completely inverted, turned 180 degrees on its stalk. An orthotropous ovule is a completely straight ovule with the micropyle located at the apex.A campylotropous ovule is an ovule in which the body is curved and bent so that the micropyle and chalaza are not in a straight line.
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Concepts Used:
Plant Kingdom
The Plant Kingdom comprises all the plants that have some shared characteristics. These are bacteria (prokaryotes), photosynthetic plants, fungi, and several non-photosynthetic plants.
Read Also: Two Kingdom Classification
Several features of Kingdom Plantae are as follows:
- They are stationary. They are static and usually remain in one place only.
- They have branches that expanded and green leaves due to the presence of chlorophyll.
- They are an autotrophic mode of nutrition that simply means they prepare their food with the help of water, sunlight and carbon dioxide. It is further known as self-nutrition.
- They indulge in photosynthesis during the day and therefore more carbon dioxide is needed during the day and at night it is released.
- They secure their food in the form of starch-like algae.
- They have an inelastic wall around their cell known as a cell wall comprised of cellulose.
- There is an absence of the nervous system and excretory system.
- Reproduction is entirely dependent on air, insects and water. Asexual and vegetative method of reproduction is noticed or detected.
- The non-photosynthetic plants acquire their food through parasitism, i.e through their host like Indian pipe.
Read More: Classification of Plants