What action illustrates how a negative feedback mechanism reduces body temperature?
a. Smooth muscles in blood vessels constrict to heighten performance.
b. Skeletal muscles in the chest slow to decrease the rate of breathing.
c. Endocrine glands increase secretion of hormones to stimulate activity.
d. Sweat glands secrete more sweat to cool the body as it evaporates.
e. Sensory receptors signal the brain to increase hormone activity.

d

Explanation:

As evaporation leads to cooling from vasodilatation from the regulation of the hypothalamic set point for homeostatic body temprature.

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.