A. alleles are variations of a gene trait
approximately 115 days
Human red blood cells (RBC), after differentiating from erythroblasts in the bone marrow, are released into the blood and survive in the circulation for approximately 115 days.
Answer:
D. They find more things that are not understood
Explanation:
After discovering something, scientist tend to find something related that sparks their curiousity.
Answer:
The growing population demands more food and more land for their needs. As it increases, more land is used for building houses and factories.
Explanation:
