Process of Natural Selection – Cornell Notes Assignment #3

Cornell Notes Write the underlined yellow words on the left side and the definition and descriptions on the right side. At the end of the notes make a summary.

Overproduction egg sac

Overproduction:. when organisms in a. population. produce Overproduction: when organisms in a population produce more offspring than their environment can support.

Example: Tarantula’s egg sac can hold 500 to 1,000 eggs. Some eggs will survive and develop into adult spiders and some will not.

Inherited Variation

Variation:. Differences in a. population of organisms Variation: Differences in a population of organisms of the same species. ● (helpful) variations are passed to offspring from their parents through genes/alleles.

Example: Every individual has its own combination of traits. Each tarantula is similar but not identical, to its parents.

Struggle to Survive (adaptation)

Adaptation:. An inherited trait that. helps an organism Adaptation: An inherited trait that helps an organism survive and reproduce in its environment.

Example: Some tarantulas may have traits that make it more likely they will survive. A tarantula may be better able to fight off predators, like the wasp (pictured on front).

Successful Reproduction (natural selection)

● Natural Selection: When organisms with helpful variations (adaptations) are better able to survive and reproduce in their environment. Large populations have a greater chance of having traits that allow survival in a new environment .

Natural Selection Over time the offspring with helpful variations increase and become a larger percentage of the population.

The offspring may inherit the traits that help them survive. ● Example: Tarantulas best adapted to their environment are likely to survive and reproduce. The offspring may inherit the traits that help them survive.

Summary Write 2 to 3 paragraphs reviewing the information that your just wrote.