How do you know a fish is vertebrate? A. It has backbone
B. It has a tail
C. It has radial
D. It has an exoskeleton

Easy 6th grade work! 100 points! i need fast! compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city, describe the parts of a cell and their primary function.

Which of the following determines the specificity of a dna probe? a. type of radiation b. level of enzymatic activity c. number of neutrons d. complementary base pairing

What is the most common structure of volcanoes?