Answer:
Option-C
Explanation:
The oxygen revolution refers to the increasing concentration of oxygen in the atmosphere around 2.3-2.4 billion years ago.
The studies have suggested that before the oxygen revolution the Earth's atmosphere was full of the hydrogen sulfide and methane gas in which the anoxygenic prokaryotes were evolving.
The cyanobacteria and other photosynthetic bacteria evolved the photosynthetic pigments which performed the experiment and oxygen gas was produced as a by-product.
With time this oxygen got accumulated in the atmosphere and the oceans and became one of the factors of anaerobic prokaryotic, the condition which they cannot escape. Later the oxygen producing prokaryotes evolved and formed the first eukaryotes.
Thus, the selected option is the correct answer.
Epididymis
Tube in each part of the testis where sperm is stored temporarily
Happy thanksgiving if you celebrate it
The main difference between homologous structures and vestigial structures is that homologous structures are the similar anatomical structures inherited from a common ancestor whereas vestigial structures are the anatomical structures which have reduced their size as they are no longer used.
Germany 9,785 mW
Spain 3,386 MW
Japan 2,633 MW
United states 1,6650 MW
Italy 1,167 MW
Czech republic 465 MW
China 305 MW
India 120 MW
France 272 MW
Belgium 363 Mw
