Question

Siphonogamy is followed by zooidogamy incycas reproduction

Answer 1

Siphonogamy: Plant reproduction in which a pollen tube grows to enable male gametes to pass to the ovary without leaving the protection of the plant. 
Siphonogamous reproduction is found in all angiosperms and most gymnosperms, and has enabled these plants to reduce their dependency on wet conditions for reproduction, unlike the zoidogamous plants .

Zoidogamy is a type of plant reproduction in which male gametes (antherozoids) swim in a film of water to the female gametes. Zoidogamy is found in algae, bryophytes, pteridophytes, and some gymnosperms (others use siphonogamy). Zoidogamy is interesting evolutionary, as it provides a pathway from wind-borne and similar mechanisms to fluid-based mechanisms used in most animals

SUMMARY - THERE ARE IS NOTHING CALLED ZOIDO- SIPHONOGAMY. BOTH

Answer 2

Cycas reproduction

Explanation:

• Cycas fertilization exhibits both siphonogamy (I. e. the arrangement of pollen tube) and zoidogamy (for example support of ciliated male gametes). In the archegonial chamber, the tip of the dust tube burst to release its substance. One of the sperms enters the archegonium. While moving towards the egg, the sperm lost cilia and cytoplasmic layer.  
• Siphonogamy: Plant generation in which a dust tube develops to empower male gametes to go to the ovary without leaving the assurance of the plant.  
• Siphonogamous proliferation is found in all angiosperms and most gymnosperms and has empowered these plants to decrease their reliance on wet conditions for propagation, not at all like the zoidogamous plants.  
• Zoidogamy is a sort of plant proliferation where male gametes (antherozoids) swim in a film of water to the female gametes. Zoidogamy is found in green growth, bryophytes, pteridophytes, and a few gymnosperms (others use siphonogamy). Zoidogamy is an intriguing developmental, as it gives a pathway from wind-borne and comparative instruments to liquid based components utilized in many animals