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.

Greenthe fossil record is the history of life recorded byhuman observationgod. climatologists. remains of the past.

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.