Variation is useful for the survival of species over time because if a population faces drastic changes in its niche, individuals with variations may have a better chance of surviving and adapting to the altered conditions, ensuring the species’ continuity.

Changes in niches can occur due to factors beyond the control of organisms, such as fluctuations in temperature, variations in water levels, or events like meteorite hits.

Reproduction is linked to the stability of populations because it ensures the continuity of species, allowing them to maintain their presence in specific niches within the ecosystem.

The consistency of DNA copying is crucial for maintaining body design features that allow organisms to effectively use their particular niches in the ecosystem.

Reproduction is not essential for the immediate survival of an individual organism because processes like nutrition, respiration, and excretion are more directly related to an individual’s immediate life functions.

No biochemical reaction is absolutely reliable, indicating that variations are expected during the process of copying DNA.

The two cells are not likely to be absolutely identical because variations can occur during the copying reactions involved in DNA replication.

Cell division occurs as a result of DNA copying. The separated DNA copies each have their own cellular apparatus, leading to the formation of two cells.

Separating the two copies of DNA is necessary because it is a fundamental step in reproduction. Simply pushing one copy out and keeping the other in the original cell would not be effective in generating new organisms with the same ...

A basic event in reproduction is the creation of a DNA copy, where cells use chemical reactions to build copies of their DNA.