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:
24 pounds
Explanation:
If any thing as a estimate is probably asking you on knowledge you already know so with this in mind we're talking about a raccoon weighing Pounds vs Tons. A ton weighs about 2000 pounds. while a pound weighs well a pound.
<span>The Interstate Commerce Commission was created in attempt to increase control. I hope I helped:)</span>
The correct answer is B: To increase economic growth
With regards to economic growth, the <em>goal</em> of expansionary fiscal policy is to <em>increase economic growth</em> by the government expanding its money supply to the economy. It is achieved when the government seeks to increase aggregate demand through high government spending and lower tax levels. The purpose of expansionary fiscal policy is to boost the growth of a healthy economic level. The government usually wants to reduce unemployment, increase consumer demand, and avoid a recession.
