Which element is considered the most versatile element in living organisms and why?

One group of reptiles, characterized by the fossil ark metal x

Imagine a rocket launching from earth and travelling to the moon. in which order would the rocket pass through the layers of the atmosphere? thermosphere, mesosphere, stratosphere, troposphere troposphere, mesosphere, stratosphere, troposphere thermosphere, stratosphere, mesosphere, troposphere troposphere, stratosphere, mesosphere, thermosphere

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays