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.
Aaron Burr......................
Answer:
D. Ethnic cleansing in Bosnia led to a military response from international forces, but ethnic cleansing in Rwanda did not
Explanation:
The genocides in Bosnia and Rwanda are part of the numerous genocides that took place in the past several decades. The genocide in Bosnia was initiated by Serbian nationalist, and it was toward the Muslims and the Croatians. The international community did reacted though to stop it, and sent its military forces in order to put things under control. The genocide in Rwanda though took another course. The Hutu started to perform genocide over the Tutsi minority, but the international community was hesitating should it react or not, if it does in which way, and while it was thinking the genocide was going on and on. Luckily for the Tutsi people, they had their own military forces that were well equipped, so they managed to stop the aggression form the Hutu before they made a full scale genocide.
Answer:
because they are foreign countries and the americans would rather gain trust in them before they make deals with them.
Explanation:
Most of the slave trade happened in the south because it's where all the plantations were
