Bio Unit 7 Test

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

Where do adaptations come from?

• The individual organism decides to adapt

• Mutations that give an organism an advantage in its environment

• Genetic recombination during meiosis

• Both mutations and genetic recombination are sources of adaptation

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

Do organisms "decide" to evolve and change? (they have the ability to change whenever they want)

• Yes, they know they need to change to survive 
• No, they change because of natural selection

This is an example of which type of adaptation?

• Physiological

• Structural

• Behavioral

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