Question

1. phylogeny is

(a) the number of evolutionarily related species in an
ecosystem.
(b) the branching pattern of evolutionary relationships.
(c) the process of evolution that creates new species.
(d) the genetic biodiversity of a species.

Explanation:

Phylogeny refers to the evolutionary history and relationships among species or groups of organisms. It is represented as a branching pattern (phylogenetic tree) that shows how different species have evolved from common ancestors. Option (a) is incorrect as it refers to the number of related species (which is more about species richness in an ecosystem). Option (c) is about speciation (the process of creating new species). Option (d) is about genetic biodiversity within a single species. Only option (b) correctly describes phylogeny as the branching pattern of evolutionary relationships.

Answer:

B. the branching pattern of evolutionary relationships.