Biology - February 2007

A population of crocodiles is said to be in Hardy-Weinberg equilibrium. If so, which of the following must be true?
A.
Genetic drift is taking place.

B.
New individuals are migrating into the population.

C.
Natural selection is placing pressure on allele frequencies.

D.
No new mutations have occurred.

2007-02-01 13:53:35 · 4 answers · asked by mike 1

Most populations on earth are affected by several factors, such as genetic drift, mutations, and natural selection. Which of the following statements can be made about a population that experiences changes in gene frequencies?
A.
The Hardy-Weinberg equilibrium is maintained.

B.
Evolution is occurring in the population.

C.
Lethal genes will eventually be expressed.

D.
Mutations will not affect the population.

2007-02-01 13:43:53 · 3 answers · asked by mike 1

I've heard that people from the Basque region of Spain and France have an extra rib. A friend of mine went to the doctor, who asked him whether he was a Basque, just by looking at an XRay. My friend is in fact Basque and doesn't think this was a coincidence.

2007-02-01 13:23:25 · 5 answers · asked by bulgariangoddess 1

give an example.

2007-02-01 13:08:02 · 3 answers · asked by Anonymous

an ex: would be the difference between normal and sick-cell hemoglobin)

2007-02-01 13:06:40 · 3 answers · asked by Anonymous

2007-02-01 13:01:36 · 6 answers · asked by Anonymous

in biology we are studying evolution and Darwin's theory. We have to do a research paper. One of the questions is "Why do Scientists believe that there was no Oxygen gas in Earth's Early atmospher." I know how we oxygen was created, but I can't find why scientists think it didn't exist. Does anyone know this answer?
If you do, please try and include your scource (my bibliography)

thanks!

2007-02-01 12:59:36 · 3 answers · asked by Anonymous

Chinchilla coat color in mice is due to a recessive allele (c^ch) and the normally pigmented coat, called "agouti," is due to the dominate allele. Mice heterozygous for chinchilla coat color are mated to homozygous chinchilla (c^ch/ c^ch) mice, and the resulting progeny include both agouti and chinchilla phenotypes. if one takes one of the agouti progeny and it mates it into one of its chinchilla sibs, the expected genotypic ratio among their offspring is - (A) 3: 1, (B) 1:1, (C) 9:3:3:1, (D) 1:2:1, (E) none of these.

2007-02-01 12:59:04 · 3 answers · asked by whatsupman 1

2007-02-01 12:49:36 · 7 answers · asked by Anonymous

2007-02-01 12:47:43 · 5 answers · asked by Anonymous

By algae I mean Carrageenan, Alginates, and Beta Carotene.

2007-02-01 12:46:46 · 4 answers · asked by ♥Whatever♥ 1

i know that the DNA polymerases add nucleotides to those according to the base-pairing rule (Chargaff's rule), but what prevents it from doing it wrong?
simple question, 10 points for the first person with the correct answer! =)

2007-02-01 12:41:38 · 3 answers · asked by Anonymous

I'm sure you guys know what I mean - that sudden jolt as if you're falling.

What causes that?

2007-02-01 12:35:08 · 19 answers · asked by LadyRebecca 6

I understand that evolution plays an important part of microbiology and other macro organisms, but what other theories in the biological science field has come up to counter Darwin?

Please don't confuse this as a religious question

2007-02-01 12:31:17 · 10 answers · asked by ibid 3

2007-02-01 12:26:47 · 6 answers · asked by Anonymous

2007-02-01 12:23:19 · 4 answers · asked by Lim S 3

What are 2 (for each) general structural similarites between:

Nematodes & Annelids?
Annelids & Mollusks?

I've been searching through my textbook, but they don't explain organism structure in detail. I haven't found any useful info on the web so far either .All I keep finding are differences. = (

I would really appreciate your help. Thanks! = )

2007-02-01 12:16:13 · 1 answers · asked by Miss*Curious 5

how do prokaryotic cells divide?

2007-02-01 12:03:08 · 3 answers · asked by lex 1

2007-02-01 12:00:07 · 4 answers · asked by Joe Kim 2

just curious

2007-02-01 11:51:11 · 2 answers · asked by pleasehelp 1

2007-02-01 11:40:07 · 3 answers · asked by mark1313 1

They are these weird multi-colored specks that disappear whenever you try to look at them directly. Supposedly they are your eye molecules or something, but where's your imagination?

2007-02-01 11:39:31 · 4 answers · asked by bambam7654 2

is it because we dont need cell support like plants do?

2007-02-01 11:35:36 · 2 answers · asked by what? 7

2007-02-01 11:29:04 · 1 answers · asked by what? 7

Males and females of an African swallowtail butterfly look differently from each other. Males look like typical black and yellow swallowtails and are readily preyed upon by birds. Females however, show various patterns of black, white and orange, and the color patterns in a particular population are copies of sympathetic species that taste very bad and is rarely preyed upon by birds. Is natural selection or genetic drift responsible for the fact that male and female butterflies don't resemble each other and support your answer with detailed reasoning. If it si natural selection, what mode is occuring, if it is genetic drift, what event is leading to genetic drift?

2007-02-01 11:22:07 · 3 answers · asked by hockeyislife21 1

1. Obtain a short piece of dialysis tubing (12-15cm), and soften it by soaking it in deionised water.

2. Fold one end over and tie it tightly with a piece of thin string or strong thread.

3. Fill the bag with solution A, a liquid "meal" containing 25% glucose, 0.5% egg albumin, and 1% starch.

4. Fold over the top, squeeze out all the air, and tie tightly. The bag should be limp.

5. Place the bag in a small beaker and add enough of solution B (iodine-KI solution) to cover it. Let it stand for an hour or so while you go on.

2007-02-01 11:21:34 · 2 answers · asked by jigglymint 1

2007-02-01 11:16:11 · 5 answers · asked by JENNiFER W 1

So i did this experiment where we covered plant pots with cellophane paper, green, blue, red and clear and green grew the fastest but it was really wqeak and the leaves were very pale.
So does anyone know why the chye sim plant under the green cellophane grew this way?
I'm really stuck here.Could someone pls help?

2007-02-01 11:15:53 · 2 answers · asked by Anonymous

please explain your resoning?

2007-02-01 11:09:50 · 2 answers · asked by doctorhockey18 3

Explain why this statement is true.

2007-02-01 11:05:02 · 4 answers · asked by Samantha 1