Don't understand this biology question.....?
967608
a. UUACCG (U replaces T in RNA copies) \nb. AAUGGC (the opposite of the above)\nc. A codon is a code for an amino acid. ("3 letters")\nd. The code was copied wrong and therefore a mutation in this case I would say a point mutation because one letter is changed out of the code. This can cause serious problem because it changes the code for an amino acid. It substitution of a single nucleotide. If the code is different but it still codes for the same amino acid it is synonymous and does not causes prob. But if it is the non-synonymous it causes change to the specified amino acid and could lead to production of the WRONG protein or NO protein at all, which is dangerous. These cause genetic disorders such as Sickle cell anemia, cystic fibrosis, tay-sachs.\n\nAdenine bonds with Thymine (in DNA). Adenine with Uracil in RNA. And Guanine and cytosine with each other.\n\nHope this helps :)
866207
the cell dividing force lol. theres no such force. it's a spontaneous occurence
1033247
Here's a great animation that helps explain it:  http://www.johnkyrk.com/DNAreplication.html
499299
Doesn't get much simpler than this website, have fun!\n\nhttp://www.biology4kids.com/files/cell_main.html
1117274
i still dont get this question and ive read it 100 times
261179
Hmmm. I don't understand the question, can you clarify it?
1022986
Two potentially unresolved questions in evolutionary biology are how and why did sex evolve (the big unresolved issue), and why only two as opposed to more sexes is stable. theory allegedly predicts three is more stable and better than two for example.\n\nYour text book anwsers, like recombination to break the linkage between "good" and "bad" genes and to avoid parasites (red queen hypothesis) explain why sex, ONCE it has evolved, is stable and selected for, BUT not how or why it evolved.\n\nPerhaps you should consider work by Lynn Marguilas et al. on the symbiont theory. Although now largely accepted that organelles like the mitochondria and chloroplast are degenearte symbionts, and less accepted that the nucleus is too, extrapolation of this theory would allow (account for) for the evolution of diploidy and reductive meisois (and thus sexual reproduction) by having two organisms (one aerobic the other anerobic) merging and seperating according to the oxygen levels (oxygen was at first a highly toxic compound to life untill aerobic metabolism evolved). \n\nBy the way hemaphrodites are still sexual, even selfing ones.\n\nAnd additionaly please note and remember for future that sexual discrimination, like homosexual discrimination, and so on, is neither a prerequisite nor a product of sexual reproduction.
368156
I dont understand this question, it makes no sense at all
868323
So funny thanks, have to tell my biology teacher that one, actually on second thoughts perhaps not the type of thing you tell your teacher. Thanks anyway xXx
325191
Actually it makes perfect sense.  Things naturally pair together, whether it be by gravity, magnetism, parasitism or whatever reason.  eventually enough atoms will link together for convienience to form a protein, enough protiens will link together to form a cell, then we have life.  cells will then pair together to form tissues, which will pair with other tissues to increase their survival rate giving us more complex organisms.  See the steps yet?  Following that we get to higher functioning organisms.  An organism's cells reproduce millions of times in that organisms lifetime and every time the DNA is replicated there is a chance for a mistake.  How many typos do you make typing a paper?  This is where variation comes from.  Evolution and extinction come from natural selection.  As the world changes things have to adapt those that don't die. If they didn't die we wouldn't call it evolution.
582539
Don't understand the question..........
300686
I dont understand the Question?
293000
Hard question to answer.  i seem to remember a professor talking on this very subject so i will try and do him justice.\n\n1) surface tension of the phosopholipid bilayer cannot remain bound together once a cell reaches a certain size. another factor is genetic. the genome (depending on the cell type) has a pre determined size. once it is reache a phenominon called apoptosis or cellular suicide is activated bringing a wierd meaning to the welfare of the many outways the welfare of the one. anther aspect is environment.  depending on the cell and the environment it finds itself in, it must compete for for food.  larger cells need more food.  If the food source of the environment is scarce then it wil die as a result of starvation.  in biologic systems immune resppnse may play a significant factor in making the environment too hostile for life.  However lare single cell organisms do exsist.  I will not hand you the answer but I will give you a hint.  Look to Marine life..  good question!
556778
No idea what this question means.  Can you please elaborate?
487526
Sounds like a Math/Science type question to me. Why are you posting it here?\n\nBesides, I have the the slightest idea.
374218
not an exact science. has to do with dominant and recessive genes. which ever the genes fit together will determine the output. Like Punnet Squares. Could be shorter, in the middle, or taller than both of you.
80916
============================================================\nMitosis is a special kind of cell division used by eukaryote cells. You will probably find a series of diagrams in your biology text book to show the stages of mitosis; these are:\n\nprophase \nmetaphase \nanaphase \ntelophase \n============================================================\n============================================================\n2. cell division \n\neukaryotic cell \n\na. By mitosis (def).\nb. Sex cells in diploid (def) organisms are produced through meiosis (def). \n\nprokaryotic cell \n\na. Usually by binary fission (def). No mitosis.\nb. Organisms are haploid (def). No meiosis needed. \n============================================================\n\nMore at the links: