Radioactive dating determines the numerical age of rocks containing which element? A. Calcium
B. Nitrogen
C. Oxygen
D. Uranium

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

Por qué crees que los huevos con cáscara se llaman amnióticos?

Agroup of students are walking in the park and one of them takes a picture of a pollen grain that is been blown by the wind what caption can the student use for this picture