I need tips to be Valedictorian in 6th grade.?
I was valedictorian of an International Baccalaureate high school with an GPA (grade point average) of an 5.0 on a scale of 0 to 4. The key components to becoming the best in your class even at your level is to study for every thing, take notes, double up on them, review by yourself and then with someone else. Work on your weak spots and practice extra on those. I will admit I had not much of a social life, but school prepares you for college which is all study, so get started early and beat the game.
Evolution occurs at what level of organization?
Assuming the question means "biological evolution", then I agree that D is the best answer. I taught AP Biology last year, for what it's worth. Good luck with your class!
How many organizations be classified according to the engineering jobs performed?
Too many to count, there are more than 5. SPE, AADE, ASME, IEEE, API, ANSI, SWE, Tau Beta Pi....
How do nucleosomes contribute to transcription control?
"When a gene is "turned on", DNA is transcribed into RNA, but for this to occur, the histones (building blocks of nucleosomes) must be removed and/or just simply pushed out of the way (either up or down the DNA molecule). By regulating how tight nucleosome binding is (or exactly where nucleosomes bind) the cell can control how active a gene is." Essentially they wind it up and hold it tight, blocking off genes until they are needed. An analogy I like to use is rush hour traffic as nucleosomes, and your car being RNA polymerase. With all of the cars at a dead stop, nobody gets anywhere, whereas if the other cars are all gone your are free to reach your destination.
Help with a permutation/combination math problem?
1) Lets simplify the question first if the books of each subject stay together - they can be treated as one subject - so we just have four subjects - Maths, English, Science and dictionary Any one of four subjects can be first, any one of 3 second, any one of two third and the forth has only one choice left after this possibilities = 4x3x2x1 = 24 possibilities of subject arrangements If the subject books differ there is 3x2x1 = 6 ways to organise the maths books 5x4x3x2x1 = 120 ways to organise the English books 4x3x2x1 = 24 ways to organise the science books so total ways to organise books = 24 ( subject) x 6 Maths x 120 English x24 Science = 414720 ways 2) The dictionary will be next to the maths in some of the 24 subject arrangements when the dictionary is at either end - 2 opportunities exist for the maths book to be beside it (Dictionary, Maths, English, Science = D M E S) opportunities = D M E S or D M S E when in position 2 or 3 there are 4 possible opportunities exist for the maths book to be beside it M D E S, M D S E, E D M S, S D M E for both positions 2 and 3 possibilities = 2+4+4+2 = 12 in 24 total subject possibilities = 1 in 2 of all possibilities =414720/2 = 207,360 as you have already declared