The table shows data Chargaff collected on DNA nitrogenous bases in five organisms. What can you conclude from the data in this table? How does the double-helix model of DNA explain Chargaff’s rules of base pairing?

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

Which organisms udergo photosynthesis

What is the goal of cellular respiration