The population size of a species in a particular area can be determined by a technique known as mark and recapture. true or false?

What does all of the organ system in a human form

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

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million