PLZ ANSWER ITS DONE TODAY NO ONE WOULD, The fossil record helps scientists identify a single species from which other organisms have descended. Which is used to refer to this single species?

parent organism
fossils
descendant
common ancestor HELP PLZ PLZ PLZ

Agene with the original sequence of atgtt—tact underwent substitution mutation to form atatt—tact after a few generations. tact is a part of a muscle protein encoding region, and atgtt codes for a digestive enzyme. what will be the effect of this mutation? a. the production of muscle protein will be affected. b. the production of digestive enzymes will be affected. c. the production of both the protein and the enzyme will be affected. d. the production of neither the protein nor the enzyme will be affected.

How water is moving through the ecosystem ?

What are the four stages of cell signaling?