Types of Structures
Evidence of Evolution
Definitions
Theory of Evolution
Darwin
100
This vestigial structure is found in the abdomen of humans and is often surgically removed if infected or ruptured.
Appendix
100
Much of our evidence of evolution available to us show that species evolved from a ________ ___________.
Common Ancestor.
100
Change over time (slow and gradual)
Evolution
100
Evolution is 100% proven fact.
TRUE or FALSE
False, evolution is a theory.
100
What is the theory Darwin proposed?
The theory of natural selection
200
This is a vestigial structure found in the mouth of humans.
Wisdom Teeth
200
____________ are remains of organisms that have been preserved naturally. These remains show us how different organisms once looked compared to their modern day decedents.
Fossils
200
Too many offspring are produced, with some expected to die.
Overproduction/overpopulation
200
Which organism is most closely related to JAWLESS FISH ?
Cartilaginous Fish
200
He collected evidence about how living things _______ over time.
Change
300
These structures appear across many different species and are derived from a common ancestor.
Homologues Structures
300
This is the best piece of evidence of the theory of evolution being true. Each organism has a unique set in all of its cells.
DNA, Biochemical Similarities, Chromosomes or Genes.
300
Fighting for resources (biotic or abiotic, between members of the same species or different species)
Competition
300
Part of the theory of evolution is that ____________ evolve, not individuals.
Populations
300
When Darwin found fossils of birds on the islands he studied at, he claimed that these remains and the unique structures were evidence of what the birds may have looked like many generations ago.
TRUE or FALSE
True, the changes made over many generations are seen when comparing fossil record to modern day species.
400
These types of structures appear across multiple different species due to each species evolving them individually, and are not due to a common ancestor.
Analogous structures
400
Analogous structures show us how different, unrelated organisms can evolve to have VERY similar physical structures because they evolved in similar _________________.
Environments
400
Existing traits that make one best suited for its environment.
Adaptation
400
What is the main selecting agent in nature? (it "decides" which organisms are most fit)
The environment
400
What species of Bird did Darwin observe in order to make his theory of evolution?
Finches.
500
What is the name of the structures had a function in the past but now serve little to no purpose at all for the survival of the organism?
Vestigial Structure
500
The development of organisms in this stage is VERY similar across many species, even those who haven't had a shared common ancestor is a VERY long time. This is because it is a conserved process that is already perfected!
Embryonic, embryo. (NOT FETUS)
500
Differences amongst members of a population (different physical traits, genes or behaviors)
Variation
500
Natural Selection (survival of the fittest) is dependent on ____________ already existing in a population so that advantageous traits can be passed on to future generations.
Variation
500
What is the name of the islands that Charles Darwin traveled to where he made his discoveries and created the current theory of evolution?
Galapagos Islands