What role do hydrogen bonds play in the dna molecule?

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

Asea turtle has washed up on a remote section of a beach. this known as a stranding occurs when a dead,sick or injured sea turtle washed up on the shoreline. which statment best explain why stranding should be reported immediately to local authorities

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the