How do animals get nitrogen? They break down glucose molecules into nitrogen.
They convert carbon to nitrogen during fixation.
They eat it in plants and other animals.
They breathe it in from the atmosphere.

Answers to mastering biology drag the labels to their appropriate locations to complete the punnett squares for morgan's reciprocal cross. drag blue labels onto the blue targets to indicate the genotypes of the parents and offspring. drag pink labels onto the pink targets to indicate the genetic makeup of the gametes (sperm and egg). labels can be used once, more than once, or not at all. hints