Final Flashcards
Certain species who are hidden because appearance matches enviroment
Crypsis
Variation must exist among a individuals in a population
Genetic Variation
Different survival and/or reproduction with respect to characteristics of individuals with a population
Selection
A process of genetic change of a population owing to natural selection, whereby the average state of a character becomes improved
Adaption
Changes from one generation to the next
Allele frequencies
generation one of allele frequency
0.5
generation two of allele frequency
0.6
when a population experiences a dramatic decline in numbers
population bottleneck
When did the Big Bang happen?
14 Billion years ago
How did was the Galaxy created?
A collapse cloud of “dust” and gas
When did our solar system form?
4.6 Billion years ago
Similar to mounds created by cyanobacteria
stromatolites
How long did the Pre-Cambrian era span?
3.8 BYA- 570 MYA
What happened in the Archean Era?
- Diversion of Prokaryotes
- photosynthesis generates oxygen
- generation of aerobic respiration
What was the Cambrian Explosion?
-Marine animals diversify
Also know as a hagfish, lacked a vertebrae but had notochord. Also is our lineage
Agnathan
Origin of the jawed fish; earliest terrestial plants and anthropods
Silurian
Diversification of bony fish. Origin of ammonoids, insects,amphibians, ferns, seed plants.
Devonian
- Godwanaland form.
- extensive forest of vascular plants,especially lycopsids
Carboniferous
- continents aggregated into Pangea
- Glaciations
- Low sea levels
Permian
Contain Triassic, Jurrasic, and Cretaceous period
Mesozoic Era
- First mammals
- diversification of “reptiles”
- first dinosaurs
Triassic
Cone bearing plants
Gymnosperms
