Physical and chemical barriers that form the body's first line of defense against pathogens include

What role does differential reproduction play in natural selection? ! a) some organisms have different reproductive success due to nongenetic traits. b) some organisms have traits that them reach reproductive age. c) different methods of reproduction result in some organisms being genetically altered. d) reproduction varies among organisms due to pathogenic factors. the answer is not a or d based on other posts.

The image shows embryos of three vertebrate classes

In the name staphylococcus aureus, aureus is thea. kingdom.b. specific name.c. genus.d. domain name.e. family name.