The kingdom of a species means that it has it has been classified by its characteristics that may be vague or not clear and species is when an animal is classified in deeper detail and not buy vague characteristics such as a cat is related to a lion to let the cat species but it's classified in deeper detail
It is necessary to classify organisms because: ... It helps in the identification of living organisms as well as in understanding the diversity of living organisms. Classification helps us to learn about different kinds of plants and animals, their features, similarities and differences.
Answer:
The correct answer is option A.
Explanation:
The lymph node is a small bean-like structure that filters substances that move through the lymphatic pathway with the lymphatic fluid. Lymph nodes are present on different site in the human body. They contain white blood cells that soldiers of the human immune system and fight with infection and pathogens.
Immune system cell that is B and T cells both, not just located in the cortex only but medulla of lymph nodes.
Thus, the correct answer is option A.
