One example of a very complex land ecosystem, full of thousands of kinds of living things

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

Which layer will become saturated first when rain falls?

Jason, a dog breeder, decides to mate a poodle with a golden labrador retriever. he wants to get puppies with the curly hair of the poodle and the color of the labrador. what concept is shown in this example? question 6 options: artificial selection adaptation evolution natural selection