Explain how the expression of a limited number of odorant receptor genes can lead to the perception of thousands of odors. Use the evidence about the number of odorant receptor genes to support your answer.

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16

Which of the following is a feature of all cells? o a. all cells have a nucleus. o b. all cells have dna for at least part of their life cycle. het . o c. all cells are spheres. o d. all cells have a rigid cell wall.