Evolution

A grizzly bear survives because he is well-adapted to his environment. When he reproduces he passes on those traits to his offspring. This process is called

• Natural Selection

• Selective Breeding

• Random mutations

• Variations in a species

Behavioral changes of individuals of a species that allow for better survival. (Acquired traits)

• Variation
• Adaptation
• Behavior
• Environment

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

• changes in genotype, but not phenotype

What is the definition of fitness?

• ability to survive and reproduce in a specific environment
• organisms with traits well suited to their environment survive and reproduce at a greater rate
• a growing population causes a scarcity of resources
• differences in the DNA sequence

The differences among a species, like different bird beaks, are called

• genes.
• variations.
• traits.
• theories.

According to this cladogram, sharks are MOST closely related to which organism? 

• Amphibians
• Ray finned fish
• Crocodiles
• Birds

Which two orgainsms have hair? 

• Sharks & Ray Finned Fish
• Primates & Rodents
• Birds & Crocodiles
• Rabbits & Birds

The arm of a human, the flipper of a whale, and the wing of a bat all have similar bone structures. Therefore, these parts of the body would all be considered...

• homologous structures

• vestigial structures

• transitional fossils

• common ancestors

The tail bone, wisdom teeth, and appendix are all parts of the human anatomy that would be considered...

• homologous structures

• vestigial structures

• fossils

• extinct

A bird's wing and a butterfly's wing have the same function, but they have very different structures. These structures are classified as follows:

• homologous structures

• analogous structures

• vestigial structures

• embryological homologues