A small cell lived inside a larger cell to the benefit of both cells.
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The answer to this question is that photosynthesis requires
carbon dioxide. Photosynthesis is the process where plants converts the light
from the sunlight into a chemical energy like oxygen and organic compounds.
Plants also use photosynthesis in order for the plants to make food.
The middle stone age and the later stone age corresponds to the middle and the late pleistocene.
Cultural evolution during the middle and the late pleistocene :-
In southwestern Asia as well as northern and southern Africa, personal ornaments in the form of perforated seashells are recorded from the early Late Pleistocene. In the Old World, Neanderthals and anatomically modern humans are linked to a range of personal ornamentation by about 40,000 years ago (Ka). These include fully created ornaments as well as organically modified things. The appearance of figurative art, mythical imagery, and other types of items, like as musical instruments, at various times in history suggest that completely modern behavior began to emerge more gradually towards the middle of the Late Pleistocene and most definitely no later than 40 Ka. Many, but not all, of the lengthy and rigorous history of study might well have helped to the relevant data come from Europe.
Learn more about the Pleistocene age here:-
brainly.com/question/12163109
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Secondary succession happens more often because it occurs after some kind of distribution that still leaves the soil intact (mudslide,bulldozing,shoveling,or scraping off an area)
