With which archaic human species did some of the ancestors of modern europeans interbreed during the past 100,000 years

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

Is there any solid scientific evidence that humans have been cloned?

Has anyone taken the genetics unit test in connexus? not looking for answers, just a little bit what to expect and some with studying.