Question

Ir a trait A exists in 10% of a population of an asexually reproducing
species and a trail B exists in 60% of the same population, which tralt
is likely to have arisen earlier?
How does the creation of variations in a species promote survival?​

Answer 1

Answer:

Trait B is likely to have arisen earlier.

This answer is for the Creation of variation in species for survival ↓

All the variations in the species do not have equal chances of survival in the environment. The survival of the variations depends upon the nature of variation. Different individuals have different chances. Selection of variants by environmental factors forms the basis for evolutionary processes. These variations may lead to increased survival advantages of the individuals due to positive adoption of traits or may merely contribute to the genetic drift. 

Explanation:

Trait B is likely to have arisen earlier. In asexual reproduction, cell divisions results in creation of similar cells with identical copies of DNA. Therefore, in such species, a trait may come into existence in some members due to sudden mutation induced by the environmental factors. This newly induced trait in some members of species is then inherited by future generations of such organism on replication over a period of time. So, it is but natural for trait B to exist earlier than trait A, as 60 % of population with trait B is likely to have been replicating that trait for a longer period than 10 % of population with trait A.

Answer 2

Explanation:

Trait B is likely to have arisen earlier as it exists in 60% of population. The variations produced in asexually reproducing species are due to inaccuracies in DNA copying due to environmental factors and variations inherited from one generation to another get accumulated in a subsequent generation.