Question

Which of the following plants form seed and have pollen tube?

• A. Angiosperm
• B. Pteridophytes
• C. Gymnosperm
• D. Siphonogama

Answer 1

The correct option is D Siphonogama

Option D is the correct answer.
According to Engler & Prantl system of classification of the plant kingdom, Embryophyta Siphonogama or only Siphonogama is one of the 14 major divisions. The Siphonogama is a further classified as Angiosperms and Gymnosperms. With this phylum embracing the seed plants, or flowering plants, they form a large group of over 120,000 species. The marked development of the sporophyte group is characterized by the marked development of the sporophyte, differentiation of plant parts into root, stem, leaves, flowers, the reduction of the gametophyte; and development of seeds are the characteristics of this division. Being heterosporous, the fertilization of the egg cell is either through a pollen tube emitted by the microspore or by spermatozoids.