To get around this problem, you decide to use a specialized application of DNA replication, called the polymerase chain reaction (PCR). In PCR, DNA is isolated from skin cells, a blood smear, or even a few hairs and subjected to repeated rounds of replication. Not all the DNA is copied, only those unique target sequences that can be used for identification are replicated. With each round, the number of copies of target DNA doubles. For these questions, assume that there was only 1 copy of target in the initial sample of DNA. How many copies would there be after one round of PCR

i'm sorry, but can you list the answers? i cannot with something i don't know the answers to

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chris

this website is for anybody really not just for girls just saying, also while a lot of males are mean and you know there are the few who are kind and then there's the nice-guys but then theirs also guys like me who are shy we don't get out much because there are people like you who exist who would most likely punch a guy in the face so next time just think about things before you post them to a website where guys and girls can see your question.

the answer is:

carbon dioxide

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!