Question

In angiosperms the oospores on development produces ___________
A. Seed
B. Embryo
C. Protonema
D. Endosperm

Answer 1

Hint:Through the fertilization of the egg cell with the sperm nucleus zygote is formed in the oomycetes that enter a resting stage like a diploid thick-walled spore. Oospore that is germinating undergoes mitosis that gives diploid hyphae reproducing asexually from mitotic zoospores based on the favorable conditions.

Complete answer: Generally, oospore is developed from the fertilized oosphere in some algae, fungi, and oomycetes. It is a thick-walled sexual spore. These are evolved in two mechanisms, usually 1. through the fusion of two species and 2. chemically mycelia induced stimulation leading to oospore formation. Alternations of the generations occur with the spore cycle. Zygote enters into the sting state of the cycle during the spore formations.
Asexual reproduction by apomixis of oospores in the oomycetes occurs that are found in fungi as the sexual spores as these help in fungi reproduction. These are non-motile spores these are also haploid spores which are the site of meiosis and karyogamy in oomycetes.
Spores are unicellular and haploid that are produced by the process of meiosis in the diploid sporophyte of the sporangium. The multicellular gametophyte is produced under favorable conditions through the mitosis process. A zygote is formed by the fusion of two gametes that leads to a new sporophyte.
Spores are unicellular, the first cell of a gametophyte, while seeds contain within them a developing embryo (the multicellular sporophyte of the next generation), produced by the male gamete and female gamete of the pollen tube within ovule from megagametophyte. Spores germinate to give rise to haploid gametophytes, while seeds germinate to give rise to diploid sporophytes.
Hence, the correct option is (B) Embryo

Note: Megaspores that are formed within ovules and microspores that are involved in the formation of complex structures of seed dispersals are produced internally from spores of seed plants.