Question

Consider the following statements regarding gymnosperms and angiosperms.
A.In gymnosperms the male and female gametophyte have an independent existence.
B.The multicellular female gametophyte is retained within the megasporangium.
C.The gymnosperms are heterosporous.
(a)A and B are true but C is false
(b)A and C are true but B is false
(c)B and C are false but A is true
(d)B and C are true but A is false

Answer 1

Gymnosperms are a group of seed-producing plants that constitute naked seeds and survive in colder and drier climates. Angiosperms are known as flowering plants which are the most diverse group of seed-producing plants and their seeds in their fruits.

Complete answer:
Gymnosperms have a sporophyte dominant life cycle in which the gametophyte is relatively short-lived. They are developed in the spore wall and pollen grains get matured from the microspore which starts producing sperms. The megaspore develops the mega gametophytes which stage in the ovule and produce multiple archegonia that helps in the production of female gametes. The sporophytic phase and the adult phase are the main phases of the angiosperm life cycle which are heterosporous. They produce pollen grains that are generated from the microscope and act as a male gametophyte. The female gametophyte is obtained from the mega sports which are formed in an ovule.

Additional information:
Gymnosperms are a group of seed-producing plants that develop on the surface of scales or leaves. They get modified to form cones or ginkgo. Gymnosperms are divided into six phyla. They are paraphyletic and include many distinctive taxa in their fossil record which do not belong to the modern groups that include seed-bearing trees having fern-like vegetative morphology. Around 319 million years ago in the late Carboniferous period, they originated and replaced the lycopsida rainforest of the tropical region resulting in a whole-genome duplication. Angiosperms are the flowering plant that is distinguished by gymnosperms through their characteristics which include the endosperm within their seeds and the production of fruits that contain seeds. The flowers of the angiosperms plants consist of reproductive organs which are a remarkable feature that distinguishes them from the other seed plants and provides the means to have a proper species-specific building system. The stamens are lighter and contribute towards the diversification of angiosperm with adaptation to specialized pollination.

So, the correct answer is 'B and C are true but A is false'.

Note: The first species in the plant Kingdom were angiosperm which appeared around 140 million years ago. Broccoli and saffron are a type of flower. Gymnosperms constitute 550 species which range in size from small shrubs to tall trees.