Biology 2 Q3 W3

Q3 Week 3

Explain the mechanism that produce change in populations from generations to generation (e.g., artificial selection, natural selection, genetic drift, mutation, recombination).

Show patterns of descent with modification from common ancestors to produce the organismal diversity observed today.

Trace the development of evolutionary thought.

EVOLUTION

• process

• biological population

• inheritable characteristics

• successive generation of the population

• develops in a long period of time

• adapt to the changes in their environment (purpose)

350 BCE

Species are identical. They tend to remain the same species and can be arranged hierarchically.

Aristotle

​AD 1749

As species change, they migrate to another environment resulting in their distribution

​​George-Louis Leclerc

​1974

Species evolved from one common ancestor

​​Charles Darwin

1809

Species evolved from an existing species through environmental forces. Traits can be passed to the next generation.

Jean Baptiste Lamarch

​1830

All changes in the environment are uniform and gradual.

Clarles Lyell

1859

Species evolved from the process of natural selection which cause variations within the population.

Alfred Russel Wallace

Jean Baptiste Lamarck

Charles Darwin

THEORY OF ACQUIRED CHARACTERISTIC

THEORY OF ACQUIRED CHARACTERISTIC

THEORY OF USE AND DISUSE

​Sivatherium

Girrafe

THEORY OF NEED

​Moa

Ostrich

SURVIVAL OF THE FITTEST

​Darwin

DESCENT WITH MODIFICATION

Mammoth

​Mechanisms that allow a population, a group of interacting organisms of a single species, to exhibit a change in allele frequency from one generation to the next

NATURAL SELECTION

Finches

​Natural selection is the process of evolution by which organisms adapt to their environment and pass on beneficial traits to their offspring.

ARTIFICIAL SELECTION

GENE FLOW

GENETIC DRIFT

MUTATION

​Anthurium

​Mutated Anthurium

​THEORY OF EVOLUTION OR ORGANISM

MECHANISM OF EVOLUTION

a person who cares for the sick or infirm. specifically : a licensed health-care professional who practices independently or is supervised by a physician, surgeon, or dentist and who is skilled in promoting and maintaining health

​​Nurse

a scientist who studies living organisms. Studying life can mean many different things and be very complex. Biology research can focus on how an organism came to exist, how it is built, how it grows, how it functions, what it does, or where it lives.

Biologist