D. Immune System
Reproductive system is an obvious wrong answer, nervous system works with your nerves, and muscular is strength.
<h2>The Domain and its Changes </h2>
The domain is the range of mandate recognized or constrained by an appropriate leader or authority. In natural taxonomy, a domain is the leading level of taxonomic of bodies in the three-domain system of taxonomy composed by Carl Woese. It has changed over the years by changing the domain name of computers.
Plasma cells into biological mechanism
The region of the neuron containing the nucleus is ... primarily on the surface of the cell body and on the ... and most other cell organelles, ...
cell body answer is d
Macronutrients are a substance required in relatively large amounts by living organisms, in particular.
a type of food (e.g., fat, protein, carbohydrate) required in large amounts in the human diet.
a chemical element (e.g., potassium, magnesium, calcium) required in large amounts for plant growth and development.
a chemical element or substance required in trace amounts for the normal growth and development of living organisms.
