Acondition in which one gene pair masks the expression of a nonallelic gene pair is called

The condition is called EPISTASIS.

Explanation:

Epistasis is said to occur when two or more distinct genes contribute non-additively to the same phenotype. This occurs because one of the genes involve dominate or modify the other gene. There are various examples of genetic epistasis in nature. For instance, in a particular dog specie (Labrador) two genes control the color of the specie giving rise to three different coat colours in the dogs.

glycolysis

explanation:

glycolysis must occur before any of the other steps can occur.

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d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

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