Which secretion is not a barrier that prevents pathogens from entering the body? which secretion is not a barrier that prevents pathogens from entering the body? mucus. antigens. lysozyme. ear wax?

Blood, made up of red and white blood cells, work together to form

Ecosystems involve living organisms interacting with non-living things in a productive way; how is photosynthesis an example of this? answer, i will give brainiest to first person to get it right.

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.