Natural Selection

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

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

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

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

Based on the number of differences in amino acid sequence, which pair of organisms is least related to each other?

• Fruit fly-wheat

• Human - wheat

• Fruit fly- pigeon

• Human-horse

Which scientist started the modern Theory of Evolution?

• Albert Einstein

• Robert Hooke

• James Watson

• Charles Darwin

When all of the organisms of a species have died out, it is called

• evolution

• extinction

• adaptation

• natural selection

An antibiotic is...

• A chemical that kills a bug / insect

• A substance that kills bacteria

• A chemical that destroys any toxins in the stomach

• A substance created by biotechnology to induce mutations in bacteria