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.
The pollution will contaminate the water in the shed and kill of harm the animals in the water<span />
They can confiscate the abusive drug the person if using, or admit the person to rehab, or simply apply them for therapy. They can substitute the drug for something else like say it was a cigarette, you could instead use cigarette shaped candy’s. There are quite a bit of ways to help but those are just a few.
Answer:
Ha, It learned where NOT to land. That's for sure. But the answer is Operant Conditioning.
Explanation:
