1. Describe the structure of the DNA molecule You may use a diagram 2. Describe three ways in which a molecule of mRNA is different from DNA

3. Describe two ways in which a molecule of tRNA is different from mRNA

the fossil record provides evidence of a common ancestor to many species.

answer;

c. a tree whose roots are surrounded by wet sand.

explanation;

water stress is an important factor limiting the growth and productivity of forests.water stress is the most often cited cause of poor survival and growth of woody landscape plants.

-insufficient soil moisture is the most common form of water stress, but excess moisture that leads to poor soil aeration (hypoxia) can also result in reduced plant vitality. a tree whose roots are surrounded by wet sand would be least likely to experience water stress.