LECTURE 3 Flashcards
1
Q
Principles of Geology
A
Was made by Lyell
- inorganic components of Earth Dynamic
- time required for Earth geological processes vast
- novel explanations for fossils required
2
Q
Artificial Selection
A
- Breeders develop many varieties of domesticated animals in a few generations
- plant varieties, such as kale and brocoli, developed from wild cabbage
3
Q
What were that ideas that Thomas Malthus had?
A
- population growth is not always desirable
- population increases geometrically; food supply increases arithmetically
4
Q
Theory of descent with modification
A
- organisms and population can change through time (microevolution)
- lineage split and diverge increasing the number of species (speciation)
- over time novel life forms derive from old (macroevolution)
- species genealogically related
- earth is old
5
Q
What is Microevolution?
A
change in allele frequencies observed in populations through time
6
Q
What is speciation?
A
evolutionary process by which populations evolve to become distinct species
7
Q
What are the steps of speciation?
A
- variation in a population
- population divides into sub populations that still interbreed
- sub-populations become distinguishable with limited interbreeding
- distinct populations are reproductively isolation
8
Q
Why does speciation matter?
A
- matters because there are several diseases that have originated in other animals that affect us
- understanding how these pathogens affect animals, we can understand how they may affect us
9
Q
Macroevolution
A
is the change to new from old
- it may take generations occur
