Which situation allows for evolution during gene duplication?
a. existing genes are copied over generations.
b. a mutation occurs in one copy of the original gene.
c. the original gene never duplicates.
d. the original gene performs the same role as the mutated gene.

What protects the lining of the stomach from acidic gastric juices?

7. describe two strategies that parents can use to cope with stress. 8. describe the three types of childcare available to families. 9. what can parents do to be more involved in their children's education at home and at school? 10. which factors should a parent consider when choosing a childcare option?

Acell goes through cellular respiration and produces atp which it then uses to move a molecule across the cell membrane. how does the energy in the original glucose molecule change during this process? (2 points)