Les
for plants and other organisms to develop differences among their respective species the alleles of their genes must contain
variations. what is the original source of these variations?
mutation
crossing over
random fertilization
independent assortment
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genetic information in cells
(sb2.b) genetic variations
id: 422854

The source of variations is mutation.

Option (a);

EXPLANATION:

Mutation can create a completely different allele of species and this means that the new version of genes will be created with the mutation. Genetic variation refers to the difference in genes within a population.

An organism's DNA  decides how that particular species looks or behaves. With the help of mutation, DNA of that organism is affected, thereby creating a different species altogether.

It is an important source of evolution as it affects the way that the body develops or works.

c

explanation:

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation: