Provide two reasons that the number of nucleotides in the mature mRNA may differ from the number of base pairs in the gene.

In sexual reproducing animals once fertilization of the egg takes place, the exists as a single cell until cell division begins. a) egg b) larva c) sperm d) zygote

Adoctor is trying to diagnose a patient with dry skin. which of the following resources would be the most ? a magazine ad about soft skin a growth chart online articles about dry skin medical books

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?