12.Luis goes to the Museum of Natural History and sees a display of bones from a dolphin's flipper and a cat's leg. They are very different, but the display shows that their bones have homologous structures in their limbs. What can you infer about these two organisms from their homologous structures? A. They evolved at the same time.
B. They evolved rapidly.
C. They are related and share a common ancestor.
D. They live in similar environmental conditions.

What problem would a person have if the nucleic acid in one of his or her cells were damaged?

1) in saturated limewater, [h+ ]=3.98x10-13 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 2) in butter, [h+ ]=6.0x10-7 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 3) in peaches, [oh]=3.16x10-11 m a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 4) during the course of the day, human saliva varies between being acidic and basic. if [oh]=3.16x10-8 m, a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? /

Determine the reaction and balance the following equations urgent due in the morning