Placing a new document over the original and going over the lines

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%

An area has a few days of low humidity, warm air temperature, and high air pressure. what kind of weather is this area experiencing? o fog o snow storms o sun