Unit 4 Lesson 3 Understanding Natural Selection & Evolution

What does 'survival of the fittest' mean in biology?

• Living the longest

• Adapting well to the environment

• Having the most offspring

• Being the strongest physically

What is a genetic variation?

• A kind of animal

• A type of food

• A change in the environment

• A difference in traits within a species

How do environmental pressures affect organisms?

• They increase the number of species

• They challenge organisms' survival

• They provide more food

• They make organisms stronger

What is artificial selection?

• Random genetic mutations

• Human-controlled breeding for desired traits

• Environmental changes affecting species

• Natural adaptation to the environment

What is a negative effect of artificial selection?

• Increased biodiversity

• Loss of genetic diversity

• More food production

• Healthier ecosystems