Quiz_Gymnosperm 1. Ginkgo biloba is a: Shrub Tree None of these Climber Explanation:Ginkgo biloba is a tree, known for its distinctive fan-shaped leaves and its status as a living fossil. It is the only surviving species of its genus and family. 2. Ovules are not found enclosed in ovary in : Bryophyta Algae and Fungi Angiosperms Gymnosperms Explanation:In gymnosperms, the ovules are exposed and not enclosed within an ovary, which is a key distinguishing feature from angiosperms where ovules are enclosed within an ovary. 3. Special feature of pollen grains of Pinus is : They are yellow coloured and are without air bladders They are yellow coloured and have two air bladders They are white and are without air bladders They are white and have two air bladders Explanation:Pollen grains of Pinus are yellow-colored and have two air bladders, which help them float in the air and enhance their dispersal by wind. 4. Pollination in Cycas takes place by : Insects Wind Man Water Explanation:Pollination in Cycas is primarily anemophilous, meaning it is carried out by the wind. The male cones release pollen that is carried by the wind to the female cones. 5. Non-porous wood for furniture is produced by: Cupressus Cycas Pinus and Cedrus Junipers Explanation:Non-porous wood, which is dense and durable, is produced by Pinus (pine) and Cedrus (cedar). This type of wood is highly valued for furniture making due to its strength and aesthetic appeal. 6. The megasporophyll of Cycas is equivalent to which part of Angiosperm? Sepal Stamen Carpel Petal Explanation:The megasporophyll of Cycas is equivalent to the carpel in angiosperms. It bears ovules, which, after fertilization, develop into seeds. 7. The phloem of vascular system of Cycas is : With tracheids Devoid of sieve tube or sieve cells With sieve tubes and companion cells Devoid of companion cells Explanation:The phloem in Cycas lacks companion cells, which are typically found in the phloem of angiosperms. Instead, it contains sieve cells and albuminous cells. 8. Cleavage polyembryony is found in : Pinus Cycas Absent in both Cycas and Pinus both Explanation:Cleavage polyembryony, where multiple embryos develop from a single fertilized egg, is observed in Pinus, allowing for the potential development of multiple seedlings from one seed. 9. Cycas is different from mango in : Green leaves Tree habit Seeds are not enclosed in fruit wall Presence of xylem Explanation:Unlike mango, which is an angiosperm with seeds enclosed in a fruit wall, Cycas is a gymnosperm with exposed seeds, not enclosed in any fruit structure. 10. Fruits are not found in Cycas because: There is no pollination There is no fertilization There is no ovary Seeds are not formed Explanation:Cycas does not produce fruits because it lacks an ovary. In gymnosperms, seeds are exposed and not enclosed within a fruit, which is a characteristic feature of angiosperms. Loading …
