Early in development, the nervous system begins as a . A. tube surrounding a fluid-filled cavity B. spherical structure in the center of the embryo C. diffuse system of cells scattered throughout the body D. single layer of cells covering the heart and other internal organs

Go to this website and it will you with any question it's called quizzlet

Ididn't do your trials but it is mostly likely because water is unique in the fact that it has surface tension.

Producers convert energy from the environment into cabon bonds, such as those found in the sugar glucose.

Arthritis results when synovial joints are damaged and can no longer move freely. the joints between the ossicles, found in the middle ear, are synovial joints. if they became stiff from arthritis and their movements were limited, sound waves striking the tympanic membrane would not be efficiently transferred to the oval window of the cochlea. without that transmission, the fluid in the cochlea cannot move the hair cells on the organ of corti. if those hair cells do not move, no impulses relaying information about sound can be generated.