Answer:
a. shared power between the central government and states
Answer:
In the exceptionally cold winter of 1997, Lake Superior froze over between the Wisconsin mainland and Isle Royale. A pack of 8 wolves crossed the ice and reached Isle Royale, an island where they encountered a population of about a dozen wolves. It is estimated that the wolf population on Isle Royale has been isolated for over 100 years (~10 generations). The pack of 8 wolves that crossed the ice would be referred to as <u>founder population</u> and if the wolves interbreed with the island population, <u>genetic drift</u> will occur.
Explanation:
The founder effect occurs when a portion of a population (i-e the founders) separates from the old population to start a new population with different allele frequencies. Hence the pack of 8 wolves that crossed the ice would be referred to as <u>founder population</u> in the given scenario.
Genetic drift is defined as change in the allele frequencies in a population due to chance event. As in the given scenario, the pack of 8 wolves that crossed the ice, interbreed with the island population, thus change in the allelle frequency is occuring in the population , hence <u>genetic drift</u> will occur.
The correct statement is: Increased immigration has led to an improved competitive edge in the global market.
The increased immigration has led to more people with the same, or different skills to be competing on the global market, which led to a higher quality work and increased competitiveness.
The increased competition on the market is always a push factor towards an improvement in the job skills in the people competing for the jobs, as they have to be better than the others in order to get the job. Also, because there are lot of skillful workers that are always on the market, the ones that are employed are giving their best to be consistent, productive, and upgrade, in order to keep their jobs.
Answer:
tropical grassland provides important services and roles including as water catchment biodiversity reserves
Explanation:
provides our ecosystem with sufficient clean water
helps to prevent floods
