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:
On May 7, 1945, Germany signed an unconditional surrender at Allied headquarters in Reims, France, to take effect the following day, ending the European conflict of World War II. ... Meanwhile, the Western Allies entered mainland Europe for the first time with an invasion of Italy.
Explanation:
Answer
As a result of the Yazoo Land Fraud, the western boundary of Georgia was moved from the Mississippi River to the Chattahoochee River.
Explanation
Yazoo land scandal fraud was a massive real estate fraud that was penetrated by Georgia governor George Mathews and the Georgia General Assembly.
The BEST evidence to support the conclusion that the Yazoo Land Fraud was one of the most influential factors in the establishment of Georgia's borders is that as a result of the Yazoo Land Fraud, the western boundary of Georgia was moved from the Mississippi River to the Chattahoochee River. In the settlement that ended the controversy, Georgia ceded the present-day territory of Alabama and Mississippi to the federal government.
Make the president responsible for the state and national legislatures
