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Home >All Categories > Science & Mathematics >Chemistry >Open Question kart007k Member since:December 02, 2006Total points:172 (Level 1)I am trying to prepare 4N HCl solution that is saturated with NaCl. I did batch reactions where I dissolved NaCl in to 4N HCl solution and mass balanced it. I am getting about 116.5g/L @ a temperature of 22C. Is there a table available that i shows me the theoretical values at different temperatures? Any help is welcomed. Thank you for taking your time. I need this to finish my project.Answer Question

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1. Provide a plausible explanation to describe how a carbon atom from a corn plant in Iowa could end up as a sugar molecule in your body, and later be traced to a tree in Colorado.

2. Is the human population subject to the constraints of environmental resistance factors? Explain.

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I don't know how to phrase this proper but we're all made up of atoms right and we grow from the air we breath and food we eat right. But we also shed skin get cut, excrete & urinate etc. So is it possible that at one point in life are whole body is made up of competely different atoms to the ones we were born with or lets say most. Or is DNA always the exact same atoms from the start and only gaining new ones.

Bassically are we made up of the exact same material throughout life or what?

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Humans and gorillas have one different amino acid in their hemoglobin sequence. What does this say about the evolution of these two species?

A. They are probably the same species.
B. They probably have a recent common ancestor.
C. Gorillas recently evolved from humans.
D. They have no common ancestors.

Any help appreciated

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I have a Western Fence lizard that I've had for about a year now.

Now usually, when it is cold out, a Western Fence Lizard will shift to a blackish color in order to absorb more sunlight. When it starts warming up, the lizard will turn back to its regular grayish-brown pigment.

Mine's different. When it is getting cold, he turns a shade of gray-brown slightly lighter than normal, and when it gets hot out, he goes dark. I have other bluebellies and he seems to be the only one with this thing, save for another lizard outside.

So could this pigment reversal be a genetic problem? I assume it's a problem because turning dark in the heat isn't exactly a good thing.

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Home >All Categories > Science & Mathematics >Mathematics >Open Question Danzer Member since:March 08, 2011Total points:89 (Level 1)In an air pollution study performed at an experiment station, the following amounts of suspended benzene-soluble organic matter (in micrograms per cubic meter) were obtained for eight different samples of air: 2.2, 1.8, 3.1, 2.0, 2.4, 2.0, 2.1 and1.2. Assuming that the population is normal, construct a 95% confidence interval for the corresponding true mean.Answer Question

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Home >All Categories > Science & Mathematics >Zoology >Open Question Paul Member since:February 08, 2010Total points:114 (Level 1)I need to know how to tell a)when a cow is calving b)colostrum production c)next mating d)gestation period e)drying off and f)next calving. i have the lactation curve I just need to know how to label it.Answer Question

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Okay, so it's like this, this is the way I think of it. I moved to North Carolina in 1998 when I was 2 from New York. In a certain town where we lived when we first moved down, we had friends down there. They are cool and stuff, don't use much of the modern technology and their old school and all. But the town I'm in now is like all modern and people are different than the people in this down called Denton NC.

It's like, our friends from Denton for example live more like the old times, like 90's.
The people in my area are different. I don't know if it's just the areas' or what, help me out ? XD i feel like an idiot for aasking this.

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