1. En las moléculas orgánicas hecha de cadenas de unidades, cada unidad se llama y las cadenas se llaman
Los carbohidratos que
consisten en largas cadenas de azúcares se llaman

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:

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.

idk about that one.