PART OF NATURAL SELECTION — an extreme phenotype becomes favorable ex… long neck giraffes

When did Charles Darwin took HMS Beagle?

Characteristics an organism develops or acquires in its lifetime can be passed on to its offspring

NATURAL SELECTION - two opposite phenotypes become favorable and the average is unfavorable

When did Charles Darwin arrived on Galapagos Island?

When did Charles Darwin published his “ On the Origin of Species”?

VII. SOURCES OF GENETIC VARIATION • : New traits being brought into a population or taking traits out of a population. Has the greatest effect on small populations.

The total of all the alleles present in a population.

VII. SOURCES OF GENETIC VARIATION • : Affects small populations; changes in the gene pool due to storms, a catastrophe, etc. Harmful because it tends to decrease the gene pool. Not significant in large populations.

TWO MORE CONCEPTS Natural selection that causes non- related species to resemble one another.

Two or more species evolve in response to each other through competitive or cooperative adaptations. Example are flowers and their pollinators.

Charles Darwin's birthday

A structural evidence in which these are remnant of structures thta were functional but are now reduced in size and serve little or no purpose.

VI. The Rate of Evolution (based on Darwin ’ s ideas)… species arise through gradual accumulation of small variations…evolution is slow and continuous over millions of years.

Species with short reproductive rates; like bacteria, evolve quickly. Bacteria reproduce about every...?

Involves parts of the body ( wings for flying, fins for swimming).

When did Charles Darwin died?

YEAR OF LAMARCK'S THEORY

Charles Darwin The accumulated changes becomes big that the result is a new species.

MOLECULAR EVIDENCE This is the technique to separate DNA fragments according to size

The study of changes in the genetic makeup of populations.

The modern theory of evolution is Mathematically explained by ?

This is a structural evidence in which organisms has similr internal structure, but different form and function.

VII. SOURCES OF GENETIC VARIATION • : Gametes uniting during fertilization. (Included within this is concept are meiosis and crossing over).

Focuses on the population rather than the individual.

Any trace or remains of an organism that has been preserved by natural processes.

CHARLES DARWIN Liviing soace and food are limited so organisms compete to gain these resources.

A structural evidence in wjich organisms are compared in terms of their embryos at various stages.

THE FATHER OF EVOLUTION

Means thousands to millions of years

How often a particular allele (trait) is found within a population.

The more an animal uses a body part, the more developed it becomes (and vice-versa)

VI. The Rate of Evolution species remain the same (in equilibrium) for extended periods of time- evolution occurs quickly for short periods of time.

VII. SOURCES OF GENETIC VARIATION • : Randomchanges in the genetic makeup of an organism. (Actually a rare event, but causes new traits to arise).

NATURAL SELECTION - the average phenotype becomes favorable and the extremes are unfavorable

CHARLES DARWIN Organisms with variation that make them better adapted to their environment survive and reproduce. -- pass to their offspring

CHARLES DARWIN Those individuals with favorable variations will have greater chance of living long enough to reproduce.

CHARLES DARWIN Species produce more offspring than can survive.

Structural evidence in which organisms has similar external form and function but different internal attucture

The slow, gradual change in a species over time.

Involves metabolism of the organism (poison venom).

How to know evolutionary relationships?