What do proteins, carbohydrates, lipids have in common?

Ageologist determines that a sample of a mineral cant be scratched by a steel nail but can be scratched by a masonry drill bit based on this information the sample mineral has to be softer than

As the human population grows, what happens to our natural-resource requirements? o they increase o they decrease o they do not change. they go in cycles

Modern whales developed their traits through natural selection what occurs during the process of natural selection