What fraction of a substance would be left after 5 half lives?

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.

What are charcteristics of lithosphere?

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel