Astudent infected by a common cold virus ran a low-grade fever. after a few days, the student’s temperature returned to normal and the student was free of cold symptoms. the fever served as
(1)an antigen in the circulatory system
(2)an immune response to a pathogen
(3)a biological catalyst
(4)a weakened pathogen

Plz ! cattle ranchers and dairy farmers rarely allow all of their animals to reproduce instead they practice selective breeding and only encourage the reproduction of animals with specific features. which of the following cows would a dairy farm most likely choose to reproduce? a. a cow that makes a lot of milk. b. a cow that can run quickly. c. a cow with a think, soft fur. d. a cow with large, strong hooves.

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

What is the main fuel source for the work of the cell