Women have a smaller quantity of the enzyme which breaks down alcohol.

Alcohol dehydrogenase (ADH)

Alcohol dehydrogenase (ADH) enzymes are found in many organisms. These enzymes break down alcohol in the stomach and they also take part in the production of aldehyde and alcohol groups during the formation of various metabolites. Women have a lesser quantity of the alcohol dehydrogenase enzyme than men and therefore, women’s blood level is higher than that of men when they take a little alcohol.

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.