Similarities across related living organisms can be explained by the concept of a. Natural selection
b. artificial selection
c. evolution
d. common descent
e. Both a and c

What river systems the worlds earliest known civilization develop ?

Which of the following is not true of the xiongnu empire? burial mounds included glass beads and mirrors made from the sands throughout the region. there was more cooperation through trade between the tribes. other tribal units that were eventually assimilated were indo aryan, xianbei, hunyu, scythina and han chinese. as each nomadic tribe and civilization was conquered or absorbed into the larger empire, the xiongnu were able to hold more territory.

Ademocratic government allows its citizens to vote directly on most issues. however, the citizens cannot simply pass any law they want. the government has a constitution guaranteeing that certain rights can never be denied to any citizen. these guarantees were included to make sure the most popular political parties would be unable to pass laws limiting the political rights of their opponents. which principle of democracy does the government described in the passage most directly represent? a. valuing the need to compromise b. recognizing the worth and dignity of the individual c. accepting majority rule but insisting on minority rights d. respecting the equality of all citizens