Which of the following resulted from a genetic variation that was favored by natural selection?

A. cancer in a lab rat

B. the long neck of a giraffe

C. the small size of a Chihuahua

D. smoothness of a river rock

Does the sea level usually change A) quickly B) slowly

What food product is most likely to be enriched with thiamin niacin riboflavin and iron?

Describe the realationship between lifestyle and factors affecting blood flow

In corn, small pollen (sp) is recessive to normal pollen (sp+) and banded necrotic tissue, called zebra necrotic (zn), is recessive to normal tissue (zn+), The genes that produce these phenotypes are closely linked on chromosome 10, If no crossing

At the end of meiosis 2, How does the DNA in each of the four new cells compare to the DNA from the original cell?

What type of molecule that can be found in living things lacks carbon atoms

The major weakness of the job descriptive index (jdi) is that

What word refers to traces of an organism that existed in the past?

Which of the following would likely extend the Earth's supply of a nonrenewable resource?

How many growing seasons do plants with herbaceous stems usually survive?