In the cladogram, which trait separates the salmon from the salamander?

A) Lungs
B) Claws or nails
C) Opposable thumbs
D) Fur, mammary glands

What kind of action is a cause of air pollution

How does the study of genetic disorders such as pku biologists understand normal alleles?

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back