Based on what you know about DNA, can you think of a reason why it might be a good idea to have a sample of your DNA or your future children's DNA preserved in storage somewhere?

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred