Homologous and Analogous
Vestigial Structures
DNA/ Biochemical
Embryology
Fossil Record
100
What are homologous structures?
Body parts of organisms that are similar in structure and position, but different in function.
100
What is a vestigial structure?
Body parts that have lost their original function through evolution.
100
Biochemical evidence (Molecular biology) looks at how similar or different _____ is in different animals.
DNA/proteins
100
What is embryology?
The science of the development of embryos from fertilization to birth.
100
Naturally preserved remains, imprints or traces of organisms that lived long ago are called what?
fossils
200
What is an Analogous structure?
Body parts of organisms that perform a similar function but differ in structure.
200
How are vestigial structures evidence of descent from ancestral species?
A structure with no function in a living species suggests that it descended from an ancestor that used the structure.
200
The same word fit's for both fill in the blank: All organisms on earth have ______. All ______ are made of DNA.
genes
200
What is an embryo?
An unborn or unhatched offspring in the process of development.
200
Fossilized tracks or other evidence of an organism's activity are known as _______ fossils.
trace
300
The wings of a butterfly and the wings of an eagle are an example of:
Analogous Structures
300
What purpose did our appendix use to serve?
Help digest food
300
We share 84% of the same dna with dogs. What percentage do we share with a banana?
50%
300
All humans have tails as embryos. What do these tails develop into before we are born?
Our tailbone
300
Which layer is the oldest?
The deeper the older so layer A
400
The leg of a cat and the wing of a bird are an example of:
Homologous Structures
400
What are examples of vestigial structures in humans?
Appendix, tailbone, wisdom teeth, body hair, etc
400
Who is more closely related?
a shark and a dolphin or a dolphin and a human
dolphin and a human. They are both mammals. Sharks are a cartilaginous fish
400
Besides tails notochords (bone spine) and spinal cord, what other feature do all vertebrates share in early development
gill slits
400
What provides evidence that species have changed over time?
Fossil Record
500
Do homologous or analogous structures give us more evidence about two species sharing a common ancestor?
homologous
500
What is one vestigial structure in a whale?
thumb, pelvis
500
How is molecular biology used to determine relationships among species?
By comparing shared genes or proteins in different species to see how closely they match. The closer the match, the more likely they're related.
500
How can embryos be used as evidence of a common ancestor between organisms?
Evidence of common anatomy in embryos suggests that they inherited the genes for that anatomy from a common ancestor
500
In our mystery bones activity, we examined the bones of an archeopteryx. Since it has wings with both feathers and claws suggesting it was part bird and part dinosaur. What type of fossil would the remains be?
Transitional fossil