The sea otter was hunted to near extinction during the Pacific maritime fur trad
ID: 40019 • Letter: T
Question
The sea otter was hunted to near extinction during the Pacific maritime fur trade, and its range contracted to a small area in California. Since hunting was prohibited by international treaty in 1911, this species has expanded its range to the north and south along the Pacific coast. There is no evidence for the role of evolutionary processes influencing this range expansion. This type of range expansion is called:
A)
secular dispersal
B)
dispersal by diffusion
C)
adaptation
D)
jump dispersal
1 points
QUESTION 10
In what way or ways can Darwin
secular dispersal
B)
dispersal by diffusion
C)
adaptation
D)
jump dispersal
Explanation / Answer
Q. 9: C. dispersal by diffusion.
In diffusion dispersal type of expansion one species expands its population (as their population is being increased due to lack of hunting) along with the surrounding regions. No evolutionary changes occur during this tye of expansion.
Q 10: C. The strength of natural selection varies with different ecological conditions.
Darwin's theory of evolution is famous for the concept of natural selection. According to this theory as a process of natural selection, all the useful changes are preserved however they are small or big. This allowed organisms to survive better in different environments and to respoduce successfully.