Why did Mendel prevent his plants from self-pollinating? A. so they couldn't produce offspring
B. to insure that each plant's offspring would remain identical to the parents
C. to control the crossing of the traits
D. to maintain a pure strain

How do you think earths interior affects what is happening on the surface? 2. how do fossils support the continental drift hypothesis? 3. how does sea- floor spreading support the hypothesis of continental drift? 4.what do scientists observe when they studied the magnetic fields of rocks on the sides of mid-ocean ridges? 5. what is a tectonic plate ? 6. explain mantle convection 7.how can movements of the continents affect earths climate? 8. what occurs during drifting?

The two main stages of cell division are called

In this picture, groups of pigment that capture light energy are located on the