Answer:
fossils I think- correct me if I'm wrong dkfnjdf
Explanation:
Inference. It is important to distinguish between observations and inferences. ... When you do something with that observation, like draw a conclusion or offer an explanation or decide that a chemical reaction occurred, then you are making an inference.
Using a molecular<span>, scientists are able to estimate the amount of time that two species have been evolving independently.</span>lecular
Answer:
List the features of gas exchange surfaces in animals.
1)They are moist to prevent the cells from drying and to allow gases to dissolve;
2)They have a large surface area , so that a lot of gas can diffuse across at the same time;
3)They have a high concentration gradient - maintained by the movement of air & blood.
