A characteristic of Cycas that resembles ferns is:
Circinate ptyxis
- Sori in microsporophyll
- Uniflagellated male gamete
- Both A and B
The Correct Option is D
Solution and Explanation
Both Cycas and ferns share the characteristic of circinate ptyxis. This trait entails a specific method where young leaves unfurl as they mature, coiling from the tip towards the base, reminiscent of the shape of a shepherd’s crook when viewed from above.
Regarding alternative options:
(B) Sori in microsporophyll: Sori are clusters of spore-producing units typically found on the underside of fern leaves. In contrast, Cycas produces seeds in cones rather than spores.
(C) Uniflagellated male gamete: This refers to a sperm with a single flagellum for movement. However, both ferns and Cycas possess multiflagellated male gametes.
Therefore, the common characteristics between ferns and Cycas are circinate ptyxis and multiflagellated male gametes.
So, the correct option is (A): Circinate Ptyxis.
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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