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.
The correct answer should be Indus
The answer is A. Demoralizing the North with a victory on northern soil.
You’re not gonna like my answer but-
Just study them. You can write a timeline of the battles or even find one online and keep reading it until you have it implanted in your memory.
Other than that, I dunno what to say
Good luck on that test!
What three factors were responsible for the expansion of the Ottoman Empire beginning around 1300? Explain your answer in detail.
1. the shrewdness of its founder Osman( from which the name Ottoman comes) and his dexcendants. 2.control of a strategic link between Europe and Asia at Gallipoli on the Dardanelles strait 3. the creation of an army that took advantage of the traditional skills of the Turkish cavalryman and new military possibilities presented by gunpowder and Christian prisoners of war See page 578...
Hope this helps!
