White blood cells fight disease
Answer:
The correct answer is producers.
Explanation:
Producers are the organism which can produce their own food by photosynthesis by utilizing water and atmospheric carbon dioxide in presence of sunlight to form glucose molecules.
Producer are placed in the first tropic level of energy pyramid of an ecosystem.
For example grasses act as producers in the grassland ecosystem.
Any illness arising due to spoilage of food that is due to contaminated food, viruses, pathogenic bacteria or parasites that contaminates food is known as food-borne illness.
The large quantity of food can be chilled or heated quickly by dividing and placing the food into small and shallow containers.
Answer:
Antigen-presenting cells
Explanation:
Class II MHC molecules are present on the surface of all the antigen-presenting cells. Some of the examples of antigen-presenting cells (APCs) are dendritic cells, macrophages and B cells.
The Class -II MHC molecules are formed in the endoplasmic reticulum of these cells followed by binding of antigen peptide fragments to these class II MHC molecules. The antigen-MHC II complexes are then inserted into the plasma membrane of these antigen-presenting cells.