Variation and Natural Selection

Any change in the sequence of DNA is a

• recombination

• mutation

• chromatin

• independent assortment

Traits that help an organism survive are called....

• evolution
• natural selection
• adaptations
• habitats

The ability to recognize a predator is an example of a ______adaptation?

• behavioral
• structural
• physiological

Almost all populations have some variation.

• true
• false

Which is a group of organisms with similar characteristics and are able to interbreed to produce offspring

• Variation

• Species

• Fitness

• Gene

Differences in DNA between individuals or populations

• Environmental Variation

• Genetic Variation

• Adaptive Feature

• Genetic Engineering

The process of making changes in the DNA code of a living organism is called

• selective breeding 
• genetic engineering
• inbreeding
• hybridization

Which statement is part of Darwin’s theory of evolution by natural selection?

• More offspring are produced than can possibly survive.
• The organisms that are the fittest are always largest and strongest.
• The number of offspring is not related to fitness.

Which best describes these fossils?

• The oldest fossils can be found on the lower layers
• The oldest fossils can be found at the top layers
• The youngest fossils are always found on the bottom layers
• You can not tell the age of any of these fossils

Individuals that are well adapted to their environment will survive and produce:

• Fewer mutations
• Stronger genes
• More offspring
• Better traits