Francis Harry Compton Crick OM FRS (8 June 1916 – 28 July 2004) was a British molecular biologist, biophysicist, and neuroscientist. In 1953, he co-authored with James Watson the academic paper proposing the double helix structure of the DNA molecule.
The cell wall of gram-negative bacteria is thin (approximately only 10 nanometers in thickness), and is typically comprised of only two to five layers of peptidoglycan, depending on the growth stage. In gram-positive bacteria, the cell wall is much thicker (20 to 40 nanometers thick).
Answer:
b) Produce and store large numbers of white blood cells
Explanation:
The lymphatic system's primary role is to produce white blood cells. The main organs were these cells are produced are the bone marrow, the thymus, the spleen, and the lymph nodes, which are distributed in different parts of the body, such as our neck, armpits and near the groin. these organs produce and store white blood cells, that will circulate in the blood or will be in action when the blood is filtered in the spleen or lymphatic nodes.
You should always suppose to have safety goggles because you don't want to hurt your eyes
