How do some hormones affect only certain cells in the
body but not others? plz help I will give brainy but only in 15 min

Only cells having specific receptors for a hormone can respond to the hormone's presence.

Explanation:

Hormones are chemical messengers secreted into blood or extracellular fluid by one cell that affect the functioning of other cells. A given hormone usually affects only a limited number of cells, which are called target cells. A target cell responds to a hormone because it bears receptors for the hormone.

plz mark me as brainliest :)

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

: )