Evolution

Which of the following is a term for a group of similar organisms that can reproduce fertile offspring?

• individual
• population
• species
• fossil

Some organisms that share a common ancestor have features that have different functions, but similar structures.  These are known as

• vestigial structures
• analogous structures
• homologous structures
• fossil structures

Two organisms that are closely related would have

• very similar DNA sequence
• exactly the same DNA sequences
• no proteins in common
• completely different DNA sequence

Genetic variation can arise from a random change in the DNA of a gene.  The change is called a(n)

• mutation
• gene flow
• gene pool
• allele

Mutations are important because they bring about

• death of the organism in which they develop
• genetic variation needed for a population to evolve
• benefits for the individual, not for the population
• Hardey-Weinberg equilibrium within a population

The disappearance of a species.

• Evolution
• Extinction
• Migration
• Mutation

Group of organisms all of the same species, living in the same place at the same time.

• gene pool
• population
• species
• evolution

How would you describe these two features?

• Homologous structure
• Analogous structure
• Structural adaption
• Functional adaption

A horse and a donkey can successfully mate to produce offspring known as a mule.  Mules are sterile .  Would mules be classified as a species?

• Yes, mules have enough of their own traits to be considered a species.
• Yes, the fact that have different number of chromosomes makes them a different species
• No, mules are too similar to the parent species
• No, due to their inability to reproduce successfully.

Any difference between organisms of the same species

• Homologous Structure
• Radioactive Dating
• Mutation
• Variation