Unit 6 - Specication

Question 1

Selective Pressures

Answer 1

Things in environment that affect an organism’s ability to survive, determining whether or not they will survive

Question 2

Allopatric

Answer 2

-Geographic separation where environments are different on either side
-Selective pressures are different, so differential reproduction will happen as different variations are favored in these environments, eventually bringing rise to a new species

Question 3

Peripatric

Answer 3

• Similar to Allopatric, population is split due to geographic isolation
• The individuals separated are not representative of the original population because the sample is small so there is little variation
• This leads to the founder’s effect, where these individuals with specific traits will influence how the future population will turn out. - Usually the future population will exhibit some of the same characteristics as the founders because those genes have carried over time
• Genetic drift will also happen, where the population will drift from original genes because other ones are selected due to the new environment

Question 4

Sympatric

Answer 4

• Different species are developing in the same location, not split geographically
• Happens when individuals in the population only choose specific others to reproduce with, which makes them reproductively isolated from other organisms to the point of different speciation