Science & Mathematics - 21 January 2007

why are chromosomal typically more severe than allelic?
what is the cause of at least 2 chromosomal disorders?

2007-01-21 09:30:13 · 1 answers · asked by Anonymous in Biology

What are some measures being used to protect and conserve pollinating insects like honey bees?

thanks if you can help and if you cant..2 points for you..

2007-01-21 09:26:48 · 3 answers · asked by nessa 2 in Zoology

2OH-+Cr2o7-2=>2CrO4-2+H2O

2007-01-21 09:26:42 · 1 answers · asked by S 3 in Chemistry

2007-01-21 09:25:16 · 5 answers · asked by eldkda 2 in Geography

steps

2007-01-21 09:25:14 · 1 answers · asked by brian g 2 in Mathematics

2007-01-21 09:25:06 · 4 answers · asked by Victor H 1 in Chemistry

Yes, it is for a class of mine. I would appreciate some help. Please?

2007-01-21 09:24:35 · 2 answers · asked by fishcantswim 5 in Biology

Can anyone do it?

2007-01-21 09:24:22 · 1 answers · asked by Z0LA 1 in Mathematics

2007-01-21 09:24:11 · 2 answers · asked by PRob 2 in Biology

1)What is volume at standar pressure(STP), original v=10.0 L at a pressure of 500. mmhg


2)Gas occupies V=457.7 ml at 0 degrees C, what will volume be at 28 degrees C


3) Pressure is 4.50 atm at 20 degrees C. Pressure increases to 4.8 atm. What is the temperature in celcius.


4) Gas measures 1.75 L at -23 degrees celcius and 1.50 KPA. What temperature will gass occupy when V=1.30L at 2.10 KPA


5) V= 350 ml at 27 degrees C. 810 mmhg. What is volume at -3.00 degrees C and 650. mmhg.


6) What volume will .500 moles of 02 occupy at 25 degrees celcius and .520 atm?


7) Cylinder has 25,000 ml of He at 22 degrees C and 5.60 atm. How many grams of He are in the cylinder?


8) Sn + Hf---> SnF2 + H2 How many Liters of HF are needed to produce 14.2g of H2 (assume STP)3


9) At 17.5 degrees C and 740 mmhg, 11.5 g of Na reacts with H20. How many liters of H2 are produced. (Change water to H0H)
Thanks sooo much!!

2007-01-21 09:24:00 · 1 answers · asked by not857 1 in Chemistry

2007-01-21 09:22:07 · 1 answers · asked by Anonymous in Chemistry

what does the golgi apparatus do?
1)the effectiveness of white blood cells in providing protection against infectuas diseases resides in:
a)their lack of hemoglobin b)their high concentration of lysosomes c)their very large size in comparison to microbes d) their natural synthesis of antibiotic like substances e) the lack of plasma membrane
2) which three of the following play a role in protein production?
i) centrosome ii) plasma membrane iii)chromatin iv) nucleolus v)vacuole vi) robisomes
a) i, ii, iii b) i, iii, iv c) ii, iv, vi d) ii, iv, vi e)iv, v, vi
3) Which of the following sometimes act as cellular support for cells and unicellular organisms?
a)lysossoomes b)microtubles c)osteoblasts d)xylem e)erythrocytes
4) a plant cell that lacks chloroplasts does not:
a)give off carbon dioxide b)give off osygen c)take in water d)take in food
5. all the white cells of the lymphatic system are produced by the:
a)spleen b)thyroid gland c)bone marrow d)thymus gland e)lymph nodes

2007-01-21 09:21:38 · 4 answers · asked by no name 1 in Biology

My mind is completely blank...this is a first step to a more complicated problem. Can you get me started on it? I am drawing a blank. Solve x = y^2 - 8*y + 16 for y to obtain two functions that represent the upper and lower branches of the parabola.
Thanks!

2007-01-21 09:21:32 · 2 answers · asked by AlaskaGirl 4 in Mathematics

x+9y-6z= -2
-2x-8y-7x=87
-10x+4y-5z=5

2007-01-21 09:20:18 · 1 answers · asked by lirael1019 1 in Mathematics

I have two pills. One: 5 mg hydrocodone/ 500 ng acetominophen ( generic Vicodin). The other: 5 mg hydrocodone/ 325 mg acetominophen, but they don't call this one generic Vicodin. Why not? Aren't they basically the same, except one a smaller dose? Is the mg difference the only difference? And when looking for a stronger Vicodin, which chemical do you want it to contain more of?

2007-01-21 09:19:33 · 5 answers · asked by lady40 2 in Medicine

I'm working on understanding slopes, and when generally dealing with the graphs, I don't have a problem. Now I've come across this word problem, and haven't the first clue on how to begin working this.

Driving down a mountain, Tom finds that he has descended 1800 ft in elevation by the time he is 3.2 mi horizontally away from the top of the mountain. Find the slope of his descent to the nearest hundredth.

2007-01-21 09:19:05 · 2 answers · asked by bill_scott_2004 1 in Mathematics

could you show your work to get points

2007-01-21 09:18:57 · 2 answers · asked by Ramon P 2 in Mathematics

what is Na2SO4??? english chemistry...?? help please.. Well I need to name the fowwlowing compounds.. how do I do this..

Na2SO4
NaNo3
MG(NO3)2
KCLo4

please help

2007-01-21 09:17:18 · 7 answers · asked by MJ" 2 in Chemistry

Sorry this is a dead boring question, but I'm curious! As they ripen, do they become more acidic or basic. I think when they are just growing and start to just grow riper, they become acidic and as they ripen/rot they become more base...am I right? Or is there no change at all...?

2007-01-21 09:15:46 · 2 answers · asked by Anonymous in Botany

2007-01-21 09:15:40 · 5 answers · asked by Anonymous in Chemistry

I'm in Sheffield UK [for american visitors], and we had 2" snow this evening, But guess what, the gritters heve'nt been out and it's going to turn to ice[once again]. Do the gritters sit on their backside drinking tea, when the forcast is snow? Who else has had it worse in the UK.?

2007-01-21 09:15:23 · 24 answers · asked by Jeanette 7 in Weather

the gradient of the tangent of a point on a curve is given by X^2+X-2=0 now how will we find the equation of the curve if it pass through (2,1)

2007-01-21 09:13:33 · 1 answers · asked by umer 1 in Mathematics

Jim won the lottery he spent two thirds of his winnings on a house and spent two thirds of what he had left on a boat and then spent two thirds of what he had left on a hot air balloon. He spent his last £20000 on a car.
How much did Jim win on the lottery?

2007-01-21 09:12:57 · 9 answers · asked by gramatin24 2 in Mathematics

2007-01-21 09:12:22 · 1 answers · asked by Imani D 1 in Mathematics

evaluate the integral ( ^ means raised to)

1.) integration of: X^2 +2X - 1 / X^3 - X dx

2.) integration of: X^3 - 2X^2 + X + 1 / X^4 + 5X^2 + 4 dx

3.) integration of: x tan ^-1 x dx

2007-01-21 09:09:45 · 1 answers · asked by Charles P 1 in Mathematics

there is no weathering on th moon
there is no wind or water to erode the footprints
the footprints on the moon are very deep because of the apollo atrounots shoes
or the apollo astronauts on the moon made shoe deposits with space age materials

2007-01-21 09:07:47 · 11 answers · asked by lex 1 in Astronomy & Space

3
∑(2^i)=???? Thats more what the problem looks like.
1
any suggestions on a better way to phrase this question or type it in on google would be appreciated..Thanks
1

2007-01-21 09:07:23 · 4 answers · asked by Matthew B 2 in Mathematics

The hovercycle gets a headstart, but the hovercar soon follows.

s= seconds passed since hovercycle started
f(s)= feet hovercycle has gone
g(s)= feet hovercar has gone since the hovercycle started

f(s)= 8s
g(s) 5(2s-1)

When and where does the hovercar catch up with hovercycle? How much of a headstart did the hovercycle. Also, if I were to graph this, where would the x-intercepts of each line be?

2007-01-21 09:06:53 · 1 answers · asked by lirael1019 1 in Mathematics

How do you calculate 8 x (square root 10) / square root 10? Detailed explanation please.

2007-01-21 09:05:57 · 4 answers · asked by ?? ? 1 in Mathematics

2007-01-21 09:04:28 · 11 answers · asked by lady40 2 in Medicine