Choices:
<span>discovery of codons
discovery and extraction of DNA
creation of a model of DNA
creation of Photo 51
Marshall Nirenberg and Heinrich Matthaei's contribution to our current understanding of the genetic code is the DISCOVERY OF CODONS.</span>
The circulatory system is responsible for the delivery of blood
Answer:
carbon, hydrogen, oxygen and nitrogen
Explanation:
Answer:
The most basic reason that cells are stained is to enhance visualization of the cell or certain cellular components under a microscope. Cells may also be stained to highlight metabolic processes or to differentiate between live and dead cells in a sample.
Explanation:
The main reason you stain a specimen before putting it under the microscope is to get a better look at it, but staining does much more than simply highlight the outlines of cells. Some stains can penetrate cell walls and highlight cell components, and this can help scientists visualize metabolic processes.