Which evidence supports the claim that Earth’s continents formed during Precambrian time? Compaction caused rock to cool and rise to form pieces of crust.
Earth collided with a large object and threw material onto Earth’s surface.
Collisions with comets added land masses to Earth’s surface.
Earth’s surface cooled, causing rocks to cool and harden.

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?

What did you notice about the onion root tip cells that you saw at 40x power?

When a doctor suspects that a patient may have diabetes, she will often have the patient take a glucose challenge test. after the patient drinks a large amount of sugary solution, his blood is drawn and the circulating levels of glucose in the blood are determined. which of the following curves do you expect from a patient with diabetes? a. curve ab. curve bc. curve cd. normal curvee. none of the above