Variation and evolution Flashcards
1
Q
What is variation?
A
differences between individuals of the same species
2
Q
What is variation the results of?
A
Genetic information and environment
3
Q
What is plant growth effected by? (environmentally)
A
- competition for water
- comp for light
- air or soil temp
- aspect of slope (eg south facing sun)
4
Q
What are the two types of variation?
A
- Continuous (controlled by more than one set of genes
- Discontinuous (controlled by one set of genes (eg blood groups)
5
Q
What is asexual reproduction?
A
Only one parent, genetically identical to parent, no variation between offspring (clones)
6
Q
What is sexual reproduction?
A
Two parents, genetically varied offspring
7
Q
What is evolution?
A
Gradual change in species over time
8
Q
What are all the steps of natural selection?
A
- variation appears in a population
- some have a characteristic that gives them an advantage
- competition for survival
- individuals that survive are more likely to reproduce and pass advantageous gene to offspring
- over time advantageous gene becomes common
9
Q
What are the two different variations?
A
Continuous and discontinuous
10
Q
What is continuous variation?
A
the differences are quantative e.g height
11
Q
What is discontinuous variatoon?
A
the differences are categoric e.g blood type
