Asample of a radioactive element has a mass of 80 g. how much parent and daughter materials are in the sample after two half-lives?

Which of the following are causes of coastal erosion? check all that apply. beach grasses and other plants trap windblown sand. wave action carves away the coastline. groundwater under pressure is forced to earth’s surface. artificial structures stop the natural flow of sand along the coast. underground caves collapse as bedrock is dissolved.

Me . based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?

Iwill mark brainliest and all that sha-bang. what is the function of the endocrine system? a. control longer term response in the body. b. transmit messages throughout the body. c. remove waste from the body. d. all of the above