Hormones are see concept 45.1 (page 998) signals that must interact with dna in order to be effective always proteins produced only in response to environmental stress chemical signals between cells, transported in blood or hemolymph are all under the control of the pituitary gland

The answer is ‘transported in blood or hemolymph are all under the control of the pituitary gland’. The pituitary is the master gland because it controls functions of other endocrine glands that produce different hormones. Hormones allow communication between organs and tissues for physiological regulation and behavioral activities, such as digestion, metabolism, respiration, and tissue function.

The answer would be sand and gravel

He should put sand around the spill in order to contain it so that it won't spread