Evolution Notes

Name______assign.#______

  1. Title:______
  1. Scientists believe that the Earth is ______years old. The continents have ______position. The climate has ______and cooled. It is estimated the ______of all species are now extinct.
  1. The current theory of how species change is caused by ______. This is also known as “______.” Only certain members of the population will survive and ______. Ones that are most ______to the environment.
  1. If an organism reproduces, then the ______of that organism are passed to the next generation. Traits that are ______for a certain environment become more prevalent within that population.
  1. The organisms must ______to the environment. Those that don’t adapt-______. This is a very ______.
  1. Peppered Moth Example
  1. Decent with Modifications:Overtime natural selection produces organisms that have ______structures, established different niches, or occupy different habitats.
  1. History:

  1. Artificial Selection:Humans select and ______for certain traits.

Examples

  1. ______
  2. ______
  3. ______

Evidence:

  1. & 17.______ ______: Fossils that show how the same organism looked millions of years ago.______dating and ______dating.
  1. ______structures.Structures that have different mature forms in different organisms but have developed from the same type of tissue.
  1. ______-Early development of the organism
  1. ______organs-Organs or structures that do not seem to be used by the organism any longer.
  1. ______-DNA sequences in organisms are close

Sources of genetic variation in species:

  1. ______
  2. Gene Shuffling
  3. ______during meiosis
  1. Speciation:is the evolution of a ______. It occurs when ______occurs or when the production of ______is interrupted.
  1. Speciation Mechanisms:The populations are capable of interbreeding, but

**Overtime they can change so much that they become ______to breed as they adapt to their environment.

  1. Gene Pool:______genetic information of a particular population. _____ the genes present with in a population. Can change.
  1. Genetic Drift:Random ______in ______that occurs in small populations Also know as the “founder effect”
  1. ______evolution:process of two or more ______species becoming more and more ______. Example ______
  1. ______evolution:the emergence of biological structures or species that exhibit ______function and appearance but that evolved through widely ______evolutionary pathways. Example ______
  2. ______is the ______change of two or more species in close interaction. Example ______
  1. Evolution is the ______in a species over ______.

Rates of Evolution:

  1. – 41. Gradualism:

Punctuated Equilibrium:

  1. Describe resistance in bacteria.
  1. Two main sources of genetic variation: 1-______, 2-______
  1. Answer: _____
  2. Answer:_____
  3. Answer _____
  4. Answer:_____
  1. ______is the key concept in natural selection.

Summary Questions:

  1. What is evolution?
  1. What is the difference between Darwin’s and Lamark’s theories of evolution?
  1. Describe the difference between natural selection and artificial selection.
  1. Does evolution occur within one generation? Explain why or why not.
  1. What is the difference between Punctuated equilibrium and gradualism
  1. What causes the genetic changes that cause evolution to occur?
  1. What is adaptation? Why do organisms have to adapt?
  1. What is biological resistance? Why can it be dangerous to us?