Science & Mathematics - 7 December 2006

1. Why do plant cells have cell walls and animal cells not have cell walls?

2. Plant cells dont have cilia or flagella for movement. why dont they have to be mobile?

3. Which are bigger, plant cells or bacteria?

2006-12-07 10:37:40 · 4 answers · asked by Lydia 2 in Biology

me and my friend have an argument i say the blood is red and he says the blood is blue wich one of us is correct?

2006-12-07 10:37:39 · 22 answers · asked by igor f 1 in Biology

it is for science homework, but i just don't get the three ways they obtain food.

2006-12-07 10:37:22 · 3 answers · asked by Samaiyah c. 1 in Biology

This is from an AP statistics test, but i don't need an answer, just your opinion of what the question is asking for the way it is worded. I am putting the entire question below, but am specifically asking about the all-caps portion:
Suppose that two-variable data has been plotted and that the points show a clearly curved pattern. In this situation, several methods can be used to transform the data. In each of the following , data have been transformed to obtain a good model. IN EACH CASE, NAME THE MODEL AND THE EQUATION THAT BEST FITS THE UNTRANSFORMED DATA.

A.)ln(c)=0.105d=0.01

Ok, now my question is, do you think we were supposed to give the name of the model of the original equation (ln(c)=0.105d+0.01) or the untransformed equation based on the wording of my teacher's question? Thank you for your help!

2006-12-07 10:37:16 · 4 answers · asked by Emily 1 in Mathematics

http://forums.canadiancontent.net/off-topic/50381-1-000ft-tornado-hits-brighton.html

Who ever imagined that we would see such a thing in Brighton or Kensal Rise?

2006-12-07 10:31:25 · 7 answers · asked by eireblood 4 in Weather

I need to know what or where they are, but it's proving impossible and I'm running out of time.

2006-12-07 10:30:52 · 1 answers · asked by Anonymous in Mathematics

this is a homework problem that needs to be solve

2006-12-07 10:29:31 · 7 answers · asked by LaTisha K 1 in Chemistry

I really have no clue. Oops.

2006-12-07 10:29:23 · 17 answers · asked by Anonymous in Zoology

2006-12-07 10:28:50 · 3 answers · asked by jasper_all4lv 2 in Engineering

In an experiment in which I had to heat a hydrate (copper sulfate xhydrate) to form an anhydrous salt, I had to measure the mass of the evaporating dish, hydrate, and anhydrous salt. Any idea why the anydrous salt has to be measured immediately after it is cooled?

2006-12-07 10:28:39 · 3 answers · asked by Anonymous in Chemistry

name these reactions and help fill in the blank.

HNO3 + LiOH -------> I got LiNO3 + H2O and need help to balance

lead(II) nitrate + sodium carbonate I got Pb(NO3)2 + NaNO3 + PbCO3 Then need help to balance it.

C5H10 + O2 -------> CO2 + H2O Need help to balance it.

synthesis reaction of Platinium (IV) fluoride

thanks for the help

2006-12-07 10:27:41 · 1 answers · asked by Traffic 4 in Chemistry

i need to rank the following in order from least polar to most polar, i do not know what i need to look at? molecular shape? help pleez!
CH2Br2, CF2Cl2, CH2F2, CH2Cl2, CBr4, CF2Br2

2006-12-07 10:26:33 · 3 answers · asked by vadawa13 3 in Chemistry

1) carbon dioxide
2) silicon dioxide
3) hydrogen chloride
4) potassium cholride

Please choose the answer and explain why ? to get the points

2006-12-07 10:26:27 · 1 answers · asked by what ever ? 2 in Chemistry

2006-12-07 10:25:58 · 2 answers · asked by Me<3JB 2 in Biology

2006-12-07 10:23:10 · 14 answers · asked by earl grey 1 in Astronomy & Space

When can this happen?

2006-12-07 10:23:05 · 2 answers · asked by rosecrashers1365 2 in Physics

What is the purpose and/or function of the belly button? I mean it looks like it just sits there near the bottom of the stomach and tries to look pretty. Other than that, what if anything does it do? Or do scientist not yet know?

2006-12-07 10:22:43 · 6 answers · asked by Maurice H 6 in Biology

Which has the highest energy?
THe longest wavelengths?

Light waves
x rays
UV waves
microwaves
rasio waves

2006-12-07 10:22:00 · 3 answers · asked by rosecrashers1365 2 in Physics

2006-12-07 10:20:48 · 3 answers · asked by angelonavaro 1 in Other - Science

What is the relationship between wave length and energy?

2006-12-07 10:20:47 · 2 answers · asked by rosecrashers1365 2 in Physics

2006-12-07 10:20:36 · 11 answers · asked by Anonymous in Geography

lol See if you can answer it.

2006-12-07 10:20:29 · 13 answers · asked by Anonymous in Mathematics

Which guy believed the sun was at the center of the universe..


i forgot his name....


i think it is some greek guy

2006-12-07 10:20:22 · 6 answers · asked by Anonymous in Astronomy & Space

?

2006-12-07 10:19:06 · 7 answers · asked by bethany_8_5 2 in Weather

A company produces both large and small cabinets. A small cabinet requires 1 hour of labor a day and a large cabinet requires 4 hours a day. At most 80 hours a day of labor are available. No more than 60 small cabinets and 15 large cabinets can be produced in a day. If the company's profits are $120 per small cabinet and $250 per large cabinet , how many of each should be produced to maximize profit? What is the maximum profit?

Thank you for your help.

2006-12-07 10:16:44 · 2 answers · asked by Jack 2 in Mathematics

it means the giant rhinoceros that lived long ago in china harm an wolly mammoth. but i know they didn't live at same time but which will win

2006-12-07 10:16:01 · 1 answers · asked by Anonymous in Zoology

2006-12-07 10:15:36 · 9 answers · asked by dallas s 1 in Biology

An open box is to be made from a 16 inch by 30 inch piece of cardboard by cutting equal squares from each corner and folding up the sides. what size should the squares be in order to obatin a box with the largest possible volume?

2006-12-07 10:15:30 · 4 answers · asked by moporho 1 in Mathematics

Help me write this eqaution in slope-intercept form



1. y = x - 3





and if you could explain how you did it too


and if you could help me on thses to i'd be very greatful


2. y =5x + 7


3. y = 9 - 3x



4. y = -4/5x



5. y = -2/3x +4

2006-12-07 10:14:01 · 4 answers · asked by OMGwhatdidyousay!!! 2 in Mathematics

2006-12-07 10:13:34 · 1 answers · asked by christinemw81 1 in Chemistry