1.Unlike most other groups of gymnosperms, cycad species are often pollinated by
ID: 85796 • Letter: 1
Question
1.Unlike most other groups of gymnosperms, cycad species are often pollinated by animals. What advantages would there be for cycads to be animal pollinated considering the fact that most occur in tropical forests? 2. How do the leaves differ among Cycas, Zamia, and Encephalartos? 3. Regarding the species of Gnetum. How does the stem and leaf morphology of this genus differ from those of Welwitschia and Ephedra? 1.Unlike most other groups of gymnosperms, cycad species are often pollinated by animals. What advantages would there be for cycads to be animal pollinated considering the fact that most occur in tropical forests? 2. How do the leaves differ among Cycas, Zamia, and Encephalartos? 3. Regarding the species of Gnetum. How does the stem and leaf morphology of this genus differ from those of Welwitschia and Ephedra? 1.Unlike most other groups of gymnosperms, cycad species are often pollinated by animals. What advantages would there be for cycads to be animal pollinated considering the fact that most occur in tropical forests? 2. How do the leaves differ among Cycas, Zamia, and Encephalartos? 3. Regarding the species of Gnetum. How does the stem and leaf morphology of this genus differ from those of Welwitschia and Ephedra?Explanation / Answer
Pollination is the process of transferring pollen from stamens (male part of flower) to the stigmatic surface or to the micropyle region of the ovule in gymnosperm. In gymnosperm, the pollination is mostly mediated by wind. But in cycad, the pollination is mediated by animals and insects. They produce large size pollen that is then eaten by beetles and transfer from male to female cones. This method of pollination is more efficient than wind pollination and it requires less resources going in to pollen production. The leaves of Cycas are morphologically pinnate, simple and palm like trunk. The leaves of Encephelartos are dangerously sharp ended which are arranged in a terminal spreading crown or ascending order. The zamia leaves are shiny, glossy smooth and deeply ridged.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.