Mutualistic relationships between microbes and insects are common because insects . Multiple choice question. lack a digestive tract, and therefore rely on endosymbionts for carbon require additional energy to support high levels of activity lack any immune defenses, and therefore rely on microbes for this function often consume diets lacking essential nutrients

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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:

answer; benefit; harmed;