In embryonic stage humans birds and fish are similar in many aspects

Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. which most likely affects the development of these traits? testes ovaries prostate gland vulva

Control of the body is accomplished by which of the following body systems? nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?