Probability there are four basic blood groups: o, a, b, and ab. ordinarily, anyone can receive the blood of a donor from their own group. also, anyone can receive the blood of a donor from the o group, and any of these four types can be used by a recipient from the ab group. all of the other possibilities are undesirable. an experiment consists of drawing a pint of blood and determining its type for each of the next two donors who enter a blood bank.

this protocol provides a detailed procedure for nucleoprotein extraction from cultured cells and tissues in an efficient manner.

sex cells are usually half's then they find another half and make a fertilize egg

wild parsnip is a perennial plant which reproduces rapidly in areas which have no sign of agricultural activity such roadside or at no tillage open areas. it's considered invasive because it can inhibit the growth of another plant  and its reproduction is fast. there are several harmful effects of this invasive plant although its taproot is edible since it is a member of the carrot family. wild parsnips can cause skin blistering when in contact because of the chemicals it contains, second it inhibits the growth of other plants, it will restrict the growth of animals when eaten and lastly, it drives away natural pollinators like bees.