An HBB gene that codes for hemoglobin is 1606 nucleotides long. The protein-coding region of the mRNA is only 444 nucleotides long. Why?

The image shows embryos of three vertebrate classes

What field of science did harry hess study?

Which of the following is a difference between active transport and facilitated diffusion? view available hint(s)which of the following is a difference between active transport and facilitated diffusion? facilitated diffusion can move solutes against a concentration gradient, and active transport cannot. active transport involves transport proteins, and facilitated diffusion does not. facilitated diffusion involves transport proteins, and active transport does not. active transport requires the expenditure of cellular energy, and facilitated diffusion does not.