While scientists have made enormous discoveries, there is always more to learn. Knowledge is built on and reviewed. Sometimes new information reveals an error in understanding from the past. The study of how the world works is always ongoing.
D. He controlled variables by studying one or two traits at a time
Answer:
True
Explanation:
Transgenic animals are lines of animals produced by inserting copies of a specific gene or genes into a fertilized egg or early embryo.
Answer:
A. Increase the amplitude. B. Increase the frequency. C. Increase the tension on the spring.
Explanation:
all of the above
Dogs are related to canis familiaris
