Answer:
B. Push Factor
Explanation:
The Irish Potato Famine made life in Ireland difficult, that pushed people to immigrate to the United States.
Answer:
The effects that Newton’s discoveries after his death was that people understood the universe.
Hope this answer helps and have a nice day
C..............................................................................................
Answer:
justify monopolistic actions
.
Explanation:
They used this theory so they could strengthen their influence and their monopoly in the area where they had their dominance.
It was focused on the theory that the fittest are surviving and therefore that those who are having more influence and strength will prevail and thus enable their further prosperity.
1. Answer;
They evolved separately as they moved north and became two separate species.
Explanation;
The greenish warblers weren't geographically isolated, but they migrated around the Tibetan Plateau, evolving separately until they were no longer able to interbreed when both species (East and West) contacted in Siberia.
Greenish warblers were thought to have evolved from a single ancestral population that gradually diverged into two new species as it expanded northwards around the Tibetan plateau.
2. Answer;
- Their plumage patterns.
- Genetics and history
Explanation;
West Siberian greenish warblers (P. t. viridanus) and east Siberian greenish warblers (P. t. plumbeitarsus) differ subtly in their plumage patterns, most notably in their wing bars, which are used in communication. While viridanus has a single wing bar, plumbeitarsus has two. Around the southern side of the ring, plumage patterns change gradually.
Additionally, the two northern forms viridanus and plumbeitarsus are highly distinct genetically, but there is a gradient in genetic characteristics through the southern ring of populations. The greenish warblers were once confined to the southern portion of their range and then expanded northward along two pathways, evolving differences as they moved north. When the two expanding fronts met in central Siberia, they were different enough that they do not interbreed.
