A sample rock is found that contain 100 grams of a parent isotope how many grams of the parent isotope will remain after half one half life

What can you guys tell me aboutyellow journalism and the u. s. involvement in the spanish-american war.

Needed fast 15 points the process of natural selection favors certain characteristics in organisms, while it selects against other characteristics. what would happen if there was zero variation between all of the organisms on earth? a. organisms would evolve to increase variety b. natural selection would operate faster c. less food would be available d. evolution through natural selection would not occur

The tea bush grows best in east asia’s zones. a) arid and semi-arid. b) arid and tropical .c) tropical and subtropical. d) humid continental and subtropical.