What are blood transfusions NOT used for? A. Replace blood after surgery.
B. Treat blood conditions.
C. Replace blood lost in an accident.
D. Introduce new DNA during Gene Therapy.

Will mark you as ! keiko’s teacher was discussing the theory of endosymbiosis. she asked keiko to mark the organelles in the diagram that most closely resembled prokaryotes. which organelles should keiko mark? * the first image is the question and the second image is some information to you answer the !

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

Hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?