Avegan diet usually has adequate amounts of which nutrient?

A varied vegan diet usually has sufficient protein for human requirements. Vegan foods that are high in protein include beans, lentils, soy products, nuts, seeds, grains and grain products. However, there are some nutrients that may be deficient in a vegan diet, such as vit B12, omega 3 fatty acids, calcium, iodine and iron. Surprisingly, a 'vegan' diet is not necessarily healthy, and many vegans actually have a very bad diet, particularly those living in cities where being vegan is a health fad, and where many vegans consume fast food vegan options.  

the index of refraction of the second medium is higher. i just took the test trust me !

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation: