Richard is a researcher in a pharmaceutical company. his company develops a new drug to treat chronic joint pain in humans. he wants to check the effect of this drug on a group of elderly people. he divides the group into an experimental group and a control group. he gives the new drug to the experimental group, while he gives a noneffective look-alike drug to the control group. both groups give the same result. identify the effect felt by the control group, despite not taking the drug.

Placebo effect

Explanation:

Placebo effect is a scenario where a person or group believes that they had received the treatment just like the experiment group but instead in reality they have not received any treatment and even though administer the signs similar to that of experiment group taking the treatment.

A placebo does not produce real physical changes /effects. Like wise the control group did not received any real treatment but still reported an improvement in their condition

me two

explanation:

because i hate it

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]