Health-care workers are exposed to many different types of
pathogenic and nonpathogenic microorganisms. Which body systems
work together to protect the body from pathogens?

a Digestive and excretory
b Muscular and vascular
c O Circulatory and immune
d Endocrine and reproductive

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

1. what is the relationship between the shape of an enzyme and the reactions they catalyze?

2. how does an enzyme inhibitor work?

separate your answers so i dont get confused : )