Biology - February 2007

and if so then how come the water goes out of the cell in salty water instead of the salt going inside?

2007-02-19 01:34:49 · 7 answers · asked by amateurgrower 3

2007-02-19 01:31:56 · 6 answers · asked by amateurgrower 3

Very very slutty question, i'm sorry, but i cna't help it. I mena, it's the sort of thing everybody metions about but nobody really knows exactly? It's annoying me. So, facts, please?

2007-02-19 01:28:04 · 3 answers · asked by Anonymous

2007-02-19 01:18:35 · 5 answers · asked by rajgarge 1

2007-02-19 01:01:32 · 5 answers · asked by miss_demaenour 1

2007-02-19 00:56:48 · 21 answers · asked by Mini-man23 2

2007-02-19 00:47:16 · 13 answers · asked by Liam S 1

Do you think this is going to happen? I read it in the paper and it sounds like it might!

2007-02-18 23:59:25 · 14 answers · asked by Fire Juggler 2

2007-02-18 23:46:47 · 6 answers · asked by Sherlock Holmes 3

Because of cloning and science things?

2007-02-18 23:42:09 · 12 answers · asked by Fire Juggler 2

What's the size of the smallest thing that normal naked eyes can see ?

2007-02-18 23:37:30 · 4 answers · asked by Anonymous

Does it increase the speed of the moeving of electrical impulses in our brain?!

2007-02-18 23:20:02 · 6 answers · asked by Anonymous

2007-02-18 23:20:02 · 3 answers · asked by dax 1

2007-02-18 21:06:32 · 13 answers · asked by vikram s 1

According to a CSI episode an infertile rapist who left behind ejaculation couldn't be identified because it was proposed that ejaculation without any swimmers does not contain DNA. The suspect they had in custody was infertile, but then again 1 in 800 men is infertile.
Why if saliva - a product of the body - contains DNA, does not ejaculation - another product of the body - contain DNA?

2007-02-18 20:06:21 · 4 answers · asked by Wedgewood 1

It lists A, B, AB and O.
Am I a B or an AB?
Thanks.

2007-02-18 20:01:40 · 8 answers · asked by Croa 6

2007-02-18 18:37:08 · 2 answers · asked by Anonymous

2007-02-18 18:06:42 · 2 answers · asked by Anonymous

at metaphase of mitosis, each chromosomeas consists of ___ chromatid(s) and ___ centromere(s)
a. 1,1
b. 2,1
c. 2,2
d. 1,2

2007-02-18 17:21:41 · 6 answers · asked by iloverocknroll09 1

a recipe plz

2007-02-18 16:26:24 · 4 answers · asked by fat bastard 2

19.In a population of owl monkeys, allele T (TT and Tt) codes for tufted tails. The frequency of allele t (tt), which codes for nontufted tails, is 40 percent. If a new predator starts catching the monkeys by their tufts and natural selection occurs, which of the following would most likely happen over time?

A.The frequency of allele T would increase.

B.No changes would take place because the allele governing tufted tails is not dominant.

C.The frequencies for the two allele forms would equal out.

D.The frequency of allele T would decrease and the frequency of allele t would increase.

2007-02-18 16:03:12 · 2 answers · asked by Anonymous

17.How does radiometric dating help scientists pinpoint the age of a fossil?

A.Radiometric dating allows scientists to find fossils in only the lowest and oldest layers of sediment.

B.Radiometric dating shows the rate of decay of radioactive material present in any object. Scientists can use that data to find the absolute age of the fossil.

C.In radiometric dating, scientists mix the carbon in a fossil with carbon from similar fossils whose age they know. By comparing the carbon they can tell the exact age of the fossil.

D.In radiometric dating, scientists place samples of a fossil in certain liquids until the samples dissolve. The rate at which they dissolve indicates the age of the fossil.

2007-02-18 16:01:53 · 5 answers · asked by Anonymous

A) DNA
B) mRNA
C) rRNA
D) tRNA

2007-02-18 15:27:39 · 6 answers · asked by truth hurts 4

I have read about the possibilty of a human-chimp hybrid being born in a zoo in the US in the first half of the 20th centruy. there was a discovery channel thing on a chimp that closely resembled humans because it could walk upright. he was proven not to be a hybird. the rumored hybrid of the early 20th century was destroyed, allegedly. would humans respect a hybrid life as much as full human.

2007-02-18 15:23:03 · 5 answers · asked by jonatan 2

18.Which scenario would natural selection most likely work on?

A.an island with lizards that all look alike and are all eating the same food

B.a population of salmon with different skin colors that attract mates

C.all of the insects in a certain desert that have the same adaptation for saving water

D.a population of parakeets that have the same size beak

20.According to the Hardy-Weinberg principle, if p and q are unchanging in a population, the population is in equilibrium. What type of population does this scenario represent?

A.a population with constant allele frequencies

B.a population that is exposed to many environmental changes

C.a population that is experiencing rapid genetic mutations

D.a stable population that will soon experience migration

2007-02-18 15:18:23 · 2 answers · asked by Anonymous

2007-02-18 15:04:50 · 1 answers · asked by *εїз*јøɾḋÿṉ'ṡ♥ṃøṃṃÿ*εїз* 3

2007-02-18 14:55:43 · 10 answers · asked by Anonymous

6.Natural selection acts on populations of living things, usually through a specific trait. Which statement must be true about that trait?

A.The trait is passed on genetically to the next generation.

B.The trait is the same for all organisms.

C.All forms of the trait have the same impact on survival.

D.The trait is resistant to mutations.


8.A population of snails is experiencing disruptive selection in terms of their shell patterns. Which statement is most likely true about the population?

A.The frequency of the most common shell pattern is becoming higher than all other patterns.

B.The frequency of a new shell pattern is becoming higher than all other patterns.

C.Two different shell patterns are increasing in frequency, while the most common pattern is decreasing.

D.Two different patterns are combining into one very common pattern.

2007-02-18 14:47:06 · 3 answers · asked by Anonymous

what would happen if some of the DNA had been altered when translated to mRNA?
also What would happen if you translated the DNA incorrectly.
one more... how could mutations occur in a cell

2007-02-18 14:10:29 · 4 answers · asked by thomas4159 1

1. Why does allopolyploidy pobably produce more variation than autopolyploidy?

2. How can disruptive selection lead to speciation in sympatric populations of the same species?

3. How may a hybrid zone eventually lead to the extinction of species?
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1. ? I think it's because allopolyploidy is more common, whereas autopolyploidy is rare. Also something to do with the fact that autopolyploidy happens within a species but allopolyploidy happens withing different species interbreeding.

2. ???
3. ???
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Please help explain these to me, I don't really understand the concepts so I'm having trouble answering these. My book isn't helpful either, it's vague, and doesn't go in depth with any of these. It's also confusing.
I would really appreciate the help. Thank You! = )

2007-02-18 13:36:05 · 4 answers · asked by Miss*Curious 5