Which of these is not a way to show a single hydrogen molecule 1. HH

2. H 2

3. 2H

4. H-H

Explain two reasons you think it is important for scientists to search for new ways to treat cancer

Each hereditary trait corresponds to

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes