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.
B) Lenient
He didn't want to be so harsh, and knew they only were being mislead from the rich people making free labor off the slaves. Most of the confederates fighting hardly had slaves and barely shared any "racist pride". So Lincoln was Lenient.
The invasion of Laos was the first test of vietnamization.
Explanation:
The 1971 incursion of Laos is one of the neglected events of the Vietnam War. The Laotian incursion was anticipated to be a follow-up to the 1970 Cambodian invasion and was likewise designated as a “limited objective offensive” pointed at obstructing the progress of North Vietnamese armed rations into South Vietnam.
Answer: He was honored to serve his country in the defense for the trial and completely agreed with the verdict. He was disappointed to have to defend the British soldiers and disagreed with the verdict.
The answer for this usa test prep video is Union Pacific
