Does not require energy. Simple the food also does not require protein channels. how to identify active transport?

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

9. the history of life on earth is recorded in

Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection