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.
He was sentenced to six years in prison for his involvement in protesting
<span>Wherever the Union armies went in the South (after the Emancipation Proclamation), they were under orders to liberate any slaves they found. </span>
Answer : Great Society was a set of domestic programs in the United States launched by Democratic President Lyndon B. Johnson in 1964–65. The main goal was the total elimination of poverty and racial injustice.
Explanation:
He escalated the r a c i s t war on drugs.
He ran a r a c i s t election campaign.
He committed war c r i m e s
He made a dishonest case for war.
He did nothing in the Hurricane Katrina event
