What is likely the homeostatic reason for developing a fever

Fever ( also termed as pyrexia) is a state of body in which internal body temperature rises substantially beyond the normal range of body temperature. It is commonly caused by the infection of pathogenic agents ( such as virus and bacteria) in the body.

It is a common way to fight against and eliminate the infection as it enhances the amount of anticancer and antiviral interferon in the blood, which do not allow the infectious agents to replicate. Apart from this, they are also temperature sensitive and therefore replication becomes difficult.

Thus, presence of a fever usually corresponds to stimulation of immune response of body to fight against the infectious agents.

the answer is d. 74.02

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally