Dolphins lack vocal cords, nevertheless creating aounds: a complicated system of whistles, squeaks, moans, trills, and clicks are produced by

Dolphins doesn't have vocal cords, on the other hand generating sounds is a complex system of shrieks, Squeals, groans, trills, and clicks are generated by their sphincter muscles inside the blowhole. The sphincter muscle is a circular muscle that usually retains contraction of a natural body passageway or opening, which relaxes as required by normal physiological functioning

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a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

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