Biology - October 2007

These are the ones I can't figure out.

1.Unicellular frechwater organisms are constantly surrounded by water. How do they compensate for osmosis and stay alive?
2. Plant roots or other structures may be surroinded by water. How do they compensate for osmosis and stay alive?
3. Give an exaple of a cell type that cannot compensate for osmosis. Explain what happens to them.
4. Sea water has a higher concentration of solutes than do human cells. Why might drinking large amounts of sea water be dangerous for humans?

Help?

2007-10-14 10:22:39 · 2 answers · asked by monkeymanx8 1

I ve found to answers but i dont know which is right im working on my biology homework The total mass of living matter within a given unit of environmental area.
Plant material, vegetation, or agricultural waste used as a fuel or energy source.
Can you please tell me which is right if any thankyou

2007-10-14 08:05:28 · 4 answers · asked by ? 3

Okay, these are a few things that I have wondered about for a long time, but I just got the idea to ask them now. :)

1) What the hell is a gene? Is it just a designated portion of nucleotides? I know that it is a part of a chromosome, but is this how it works: DNA is a double-stranded collection of nucleotides. This DNA "bunches" into bundles that are called genes. These genes collectively form 1 of 23 chromosomes. ?????

2) What the hell is up with evolution? Yeah, I get it that things evolve, but for example, I remember reading about a fish that had 2 eyes but because it always laid on its side, the fish eventually evolved so that both eyes were on the same side of the head. How on earth does that happen? Just because something is more convenient for your lifestyle, how can that affect your genetic makeup?

3) Lastly, I've always been taught that DNA --> RNA --> Protein... So how does your DNA determine what you look like? I don't see facial features in there anywhere!

2007-10-14 08:05:14 · 6 answers · asked by Anonymous

1) All vertebrates have internal skeletons.
2) All vertebrates have skeletons made of bone.
3) Birds have oxygenated air in their lungs at all times.
4) Hair in mammals has no use other than warmth.
5) In mammals, glands secrete both sweat and milk.
6) There are more species of perching birds than there are species of all placental mammals.
7) A monotreme is a mammal that reproduces by laying eggs.
8) Some behavior patterns can be inherited.
9) A creature will exhibit aggressive behavior only against animals of a different species.

I think 9 is false males do it against other males right?

2007-10-14 07:55:47 · 2 answers · asked by Anonymous

2007-10-14 06:28:39 · 16 answers · asked by yennie 2

obturator foramen

2007-10-14 06:06:27 · 1 answers · asked by Terri L 2

manubrium

2007-10-14 06:05:40 · 2 answers · asked by Terri L 2

squamosal region?

2007-10-14 06:04:59 · 1 answers · asked by Terri L 2

lateral malleolus

2007-10-14 06:04:16 · 1 answers · asked by Terri L 2

superior conchae

2007-10-14 06:03:36 · 1 answers · asked by Terri L 2

I answered three curvatures; (one curvature for the cervical vertebra, one curvature for the thoracic and one for the lumbar)....but my answer was wrong!

2007-10-14 05:59:08 · 2 answers · asked by getusedtoit 4

2007-10-14 05:44:01 · 3 answers · asked by Anonymous

I cannot tickle myself. Can you?

2007-10-14 05:29:42 · 4 answers · asked by BMW M5 3

2007-10-14 03:09:38 · 5 answers · asked by Anonymous

2007-10-14 02:52:46 · 18 answers · asked by Anonymous

2007-10-14 01:37:06 · 2 answers · asked by shivington 2

At which growth stage do you think cyanogenesis would be most appropiate as a defence mechanism in plants

2007-10-14 00:29:11 · 3 answers · asked by Anonymous

2007-10-13 19:52:32 · 11 answers · asked by Anonymous

glenoid fossa

2007-10-13 18:37:11 · 4 answers · asked by Terri L 2

coronoid fossa

2007-10-13 18:36:35 · 3 answers · asked by Terri L 2

2007-10-13 18:35:49 · 2 answers · asked by Terri L 2

zygomatic process

2007-10-13 18:34:32 · 4 answers · asked by Terri L 2

greater trochanter?

2007-10-13 18:33:50 · 4 answers · asked by Terri L 2

2007-10-13 18:33:09 · 3 answers · asked by Terri L 2

World population is 6.7 billion people. If we start with the biblical number of 8 people who survived the Great Flood 4111 years ago, we get an average population growth rate of 0.5% per year. To avoid changes caused by modern technology and medicine, let's deduct the last 257 years and use only the world' population of 791,000 people in year 1750. This gives us an average growth rate of 0.3% per year. This conservative figure is less than the world growth rate of 1% per year over the past 1000 years. It is also less than the 0.8% growth rate in Africa and Asia and the 0.6% growth rate in Europe, over the past 250 years.

At this rate of 0.3% per year, if we start with just 2 people 10,000 years ago, the world population would grow to 20,000 billions. This is 3000 times higher than the current world population. If we were to start 20,000 years ago, the world population would grow to 2*10**26. That's a population density of 130 billion per square foot. Now imagine millions of years?

2007-10-13 17:03:32 · 11 answers · asked by brandlet 2

please answer!
and u will get Best answer if u find out=]

2007-10-13 16:48:38 · 3 answers · asked by onetreehunny 4

Yeah,
I cant burp on comand. But every like...8months ill burp. I burp like once a year. Is that normal? I think its wierdd!

Thanks!!

2007-10-13 15:24:58 · 18 answers · asked by Anonymous

All women in the world had their hymen torn before they ever gave birth to their first child. All the women in the world, without a single exception, were born to mothers who no longer have their hymen. Yet, we never heard of a mutation caused by womens' loss of their hymen. We never heard of a new "strain" of women who are born without a hymen. Single rare and random cases - yes. But, as a permanent mutation - no.

If "evolution" is right, this change in the body started "millions of years ago", ever since the first woman appeared in the world. For animals with hymens, this change started even earlier than for humans. So, why didn't females "evolve" into females without hymens?

Isn't that sufficient and convincing factual evidence to prove that "evolution theories" are nonsense?

2007-10-13 15:20:57 · 8 answers · asked by brandlet 2

A. Low nutrient availability
B. Ultraviolet radiation
C. Dessication
D. Difficulty of dispersal

2007-10-13 14:57:26 · 1 answers · asked by princessarianna33 1

2007-10-13 14:54:41 · 5 answers · asked by Anonymous