(Q).
Echinoderms lack a centralized nervous system, and echinoderms are represented by the starfish. Given these facts, what kind of animal doesn't have a centralized nervous system among the following options: - dog - mammals - cows - bird - human - elephants - starfish - a fish
(A).
starfish

(Q).
TRH stimulates the pituitary gland to produce thyroid-stimulating hormone, or TSH, and another function of TSH is to maintain the structural integrity of the thyroid gland. Given these facts, what stimulates the pituitary gland in order to maintain structural integrity of the thyroid among the following options: - TRH - Urea - CO 2 - PDAs - HPV - SO2 - mL - p53
(A).
TRH

(Q).
Electron transport is the final stage of aerobic respiration, and breathing gets oxygen into the body, but aerobic respiration occurs at the cellular level. Given these facts, that the cellular level, the final stage of breathing oxygen is among the following options: - keeps the organism warm - rapid expansion - permineralization - Plant growth is reduced - major threat to health - electron transport - more abundant - flow of electrons
(A).
electron transport