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.
I think Vassal
Definition of Vassal <span>- </span><span>A person who received a grant of land from a lord in exchange for a pledge of loyalty and services</span>
Henry is described as a "war devil" in the Red Badge of Courage because he loads and shoots and reloads and shoots and shoots until his rifle is so hot. He runs towards the enemy without any regard for his life, so that’s why he is described as a madman, a “war-devil”.
Answer:
An Electorial college is a body of people representing the states of the US, who formally cast votes for the election of the president and vice president.
Explanation:
Answer:
He saw that there were still vase land at the coast of the westward.
Explanation:
Montaigne was considered or known to be a Portuguese explorer, who set out on a mission in September, 1517 to discover the world. This mission was made known to have been sponsored by the Spanish government.
Although he died at the Philippines where he was killed, but one of his fleet ships was able to return safely.
It was made known that he discovered a large land at the coast of Westward, where he concluded that there might still be additional countries yet to be discovered.
