Explain symbiotic or mutualistic relationship

Providing immunity by injecting the body with a weakened form a pathogen is known as

Give the biological term for: structures that display characteristics of living organisms only within living cells

Which of the following would be a body response when stepping outside without a coat on a snowy day? a. senaceous glands. secrete more senum b. more liquid is transported by the body to the skin fir insulation c. blood vessels in the skin narrow and contract d. blood vessels in the skin expand