Yeah owls don’t mainly say boa though
It would be #2 because it dosent have those specific antigens to defend the pathogen.
Answer:
D
Explanation:
Control group in an experiment does not receive any treatments. It is used as a benchmark to ensure that there is statistical difference in data between the variables of the control and those with treatments. It also ensures that there are no other overlooked factors that have an influence on the experiment that needed to be considered. Having a control group reduces the chances of erroneous conclusions.
Answer:
sinoatrial node and atrioventricular node
