All of these are first-line defenses except a. saliva c. antibodies b. cilia d. enzymes

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

Afamily has a y-linked disease that affects the father. what is the chance of a male offspring inheriting the same disease? oa. 100% ob. 50% oc. 25% d. 0%

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above