Question

in what conditions can asexual reproduction occur?

Answer 1

Asexual reproduction takes a variety of forms. The simplest one-celled organisms may reproduce by binary fission, in which the cells simply divide in half. This form of reproduction creates a clone of the parent, and has the benefit of usually being very quick and energy efficient. For example, bacteria that reproduce by binary fission can give rise to progeny every few hours.

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Answer 2

Well, it mainly occurs in microorganisms (bacteria, protists, etc), but also it mainly occurs in the 'real world' when the reproduction need is basically quantity over quality. For example, dandelions spread their seeds via the wind when they get white and fluffy, as it allows the dandelion to spread many many 'offspring' with relative ease. So in short, asexual reproduction can occur in most environments, but asexual reproduction is only found in conditions where quantity over quality is key for survival of a species.