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.
Answer:
They both earn through their exports.
Explanation:
China is developed country while Mali is under developed country. Both the countries are different and they have high difference in their GDP. China and Mali both believes in exports and they earn through foreign exchange. Main export of Mali is gold which is sufficient to finance its country. Mali also exports cotton, fertilizers, oil and iron which are source of living for the people of Mali.
Answer:
Ghana gained independence peacefully, while Kenya and Algeria had to fight violently before gaining independence.
Explanation:
While Kenya became independent in 1963, it was through series of violence from the Mau Mau against the British. Similarly, Algeria had to fight violently against French rule before gaining independence in 1962.
The above is in contrast to Ghana who gained independence peacefully from British rule in 1957.
Hence, The key difference between the experience of Ghana's independence and that of Kenya and Algeria is that "Ghana gained independence peacefully, while Kenya and Algeria had to fight violently before gaining independence."
His decision to buy the land went against his own belief to strictly follow the words of the Constitution.
<span>The Constitution gave no guidance about acquiring lands from other countries. Jefferson was going out on a limb with the Louisiana Purchase.</span>
In 1950s, popular cultures spread due to television and print media de-emphasizing women and other minorities. Idealized white people were presented with little (if any) allusion to diversity, poverty or conflicts (such as the Civil Rights Movement). Material values and compliance were things criticized by the counterculture; literature, the Beat movement and music (rock 'n' roll) came into conflict with the "tidy suburban view of life".
