Why do farmers apply nitrogen to their fields in the spring and fall?

The surgical term that actually means male sterilization is

Humans and gorillas have one different amino acid in their hemoglobin sequence. What does this say about the evolution of these two species

What class does the penguin belong to

The sun converts blank energy into blank energy.

Which factors cause air masses to move in the United States? Check all that apply.

Those parts of a new mRNA transcript that get spliced out and don't wind up getting translated into proteins are called: a. exons b. spliceosomes c. introns d. protons

Which type (s) of respiration use glycolysis, the Krebs cycle and electron transport?

Identify the chemical equation for photosynthesis and explain why it is necessary for the survival of animal species

What type of protein would the body make in order to heal a wound? ?

When the F1 plants are allowed to self fertilize, they produced both yellow and green peas in the next generation. How is this explained?