Minerals are micronutrients required by the body for various key functions. the mineral required to carry oxygen in the blood to all body tissues, and a rich source of this mineral. minerals are micronutrients required by the body for various key functions. the mineral is required to carry oxygen in the blood to all body tissues, and is a rich source of this mineral. first blank is either calcium, iron or sodium second blank is vegetable oil, red meat or milk

The answer would be: iron; red meat

Iron is needed to form heme part of hemoglobin. Hemoglobin is the molecule from red blood cells that could carry oxygen and carbon dioxide. Food that rich in iron should be red meat or liver. Only a few vegetables have high iron like spinach. A person with low red meat diet (like in vegetarian) will have high risk of iron deficiency.

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.