The first line of defence (or outside defence system) includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils.
Answer: C. 0.024
Explanation:
The pvalue 0.024 is < 5% which shows that the expected number of offspring were statistically different from expected.
I think is a) dilates the bronchi
Im not 100% sure but the best answer I can give is Prokaryotes because they came to be around the time oxygen did as well.
I think its a , but double check because i dont want it to be wrong .
