Lecture 3 Flashcards
(25 cards)
what are Fossils ?
remains and impressions of organisms that have lived in the past
Why are many species missing from the fossil records?
1-soft bodied organisms
2-preservation requirements
3-Actually must find the fossil
What is the Law of Succession?
Same geographic regions resemble each other but are distinct from others
What is the idea of Transitional Forms?
should capture evidence of transmutations
What 5 Evidence Prove Natural Selection?
A-Fossils
B-Biogeography
C-Comparative Morphology
D- Patterns of Development
E- Biochemisty
What is the name of the first bird?
Archaeopteryx
What are realms?
large regions across the globe, organisms share geological history
What is Biography?
Study of patterns in geographic distribution of species
Ecological biogeography
extant species given current environmental conditions
Comparative Morphology
study of body forms and structures (similar body parts common ancestors)
What is Homology?
Study of likeness
What do humans, moles, bats, dolphins, and horses share?
they are common ancestors, as shown in their bone arrangement.
What are considered Homologous Structures?
Morphological divergence
What is Morphological divergence?
changes in the body form of a common ancestor
What is Morphological Convergence? Does it have derived evolutionary relationships?
two unrelated species develop similar traits but no clues of common ancestors
-No, they don’t derive from a common ancestor
What are Analogous Structures?
Similar functions but derived evolutionary, no common Ancestor
Vestigial structure are proof of What?
changes in anatomy
What are Vestigial Structures
useless versions of a body part that has an important function
Examples of Vestigial Structures?
Wisdom teeth, Appendix, goosebumps
Development patterns shift due to mutations in what ?
homeotic genes/ Hox genes
What is Developmental biology?
looking at the beginning stages of development to determine Common traits and relation
Genetics
if we look at the larger portion of the species DNA we can determine CA
Stochastic
chaotic
Arboreal
they live among the trees
