Pl help A teacher has been told that students like when they do activities that get the moving she asks her students what they think? Is it a observational study or a survey or a experiment?

The cluster of developing cells from conception until birth is called an

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

Land conservation is a worldwide priority. there are several methods to prevent the loss of land due to a variety of reasons. which method is not a way to conserve land? a) sea walls b) rainwater harvesting c) limits on clear cuts of forests d) cut and burn methods of clearing land