Biology - March 2007

is it a restriction enzyme?

2007-03-04 12:18:19 · 3 answers · asked by Anonymous

It is my science assignment

2007-03-04 12:17:50 · 1 answers · asked by jay gal 3

2007-03-04 12:17:44 · 8 answers · asked by Anonymous

According to the theory of punctuated equilibria, why does the fossil record include very few intermediate forms?

2007-03-04 12:17:39 · 1 answers · asked by Right here Right now 1

2007-03-04 12:07:49 · 6 answers · asked by Right here Right now 1

1. Some of the circular lambda molecules are colvalently linked at the COS sites. Other circlets are only hydrogen-vonded and can dissociate to form linear molecules. Heating Lambda DNA to 65 degree C for 10 minutes linearizes any noncovalent COS circlets in the preparation by breaking the hydrogen bonds that hold the complementary COS sites together.

a. Set up duplicate restriction digests of lambda DNA with serveral enzymes. Then heat one reaction from each set at 65 C for 10 mins. while holding the duplicates on ice. Relate changes in restriction patterns of heated versus unheated DNA to a restriction map of the circular lambda genome.
b. how can the data generated by this experiment be used to quantify the appros. % of circular DNA in your preparation?

2. Design and carry out a series of experiments to study the kinetics of a restriction reaction.
a. Determine approx. % of digested DNA at various time points
b. repeat experiments with serveral enzyme and DNA dilutions.

2007-03-04 12:00:23 · 1 answers · asked by swtfantasiez 2

.....

2007-03-04 11:37:19 · 6 answers · asked by Anonymous

2007-03-04 11:29:57 · 4 answers · asked by aauballa 1

First answer this question:

According to the theory of puctuated equilibria, why does the fossil record include very few intermediate forms?

Pick a question out of these 5 question and answer it:

What role does the overproduction of an offspring play in the process of natural selection?

Use an example to explain how natural selection can lead to evolution?

How are rock layers used to determine the relative age of fossils?

Explain why similarities in the early development of species suggest that the species are related.

You are a young reporter for a local newspaper near the home of Charles Darwin. You have been asked to interview Darwin about his theory of evolution. Write 3 questions that you would ask Darwin. Then choose one question and answer it as Darwin would have.

2007-03-04 11:04:25 · 1 answers · asked by Right here Right now 1

.)what exactly does the theory of evoultion state?
2.)list and explain at least 3 pieces of evidence that support the theory of evoultion?
3.)explain how natural selection helps support the theory of evoultion?

2007-03-04 10:42:58 · 1 answers · asked by carey 1

People who know stuff about evoultion?
1.)if evoultion is taught in school should we also teach creationism or intelligent design?
2.)what is some evidence that contradicts evoultion?
3.)list and explain three pieces of evidence that support the theory of intelligent design?
4.)how do you think your perspective on faith shapes your view of evoultion?

2007-03-04 10:39:07 · 3 answers · asked by carey 1

Such as knowledge of right and wrong, a conscience, love, sense of humour, grief, emotions etc. How are these things considered to have developed through natural selection. If you don't have a sense of humour or a conscience are you a target for natural selection?

2007-03-04 10:37:03 · 3 answers · asked by chimerauk 3

A couple of questions:

What is the process called where the concentration of carbon dioxide in the atmosphere remains relatively constant at about 0.4% as a resuly of established equilibrium?

What is the most important result from the process of cellular respiration?

An increase in the concentration of ATP in a muscle cell is a direct result of which life function?

THANKS SO MUCH!

2007-03-04 10:26:46 · 2 answers · asked by wings_of_imagination 1

2007-03-04 10:25:34 · 4 answers · asked by killer 1

What is the process of moving materials in and out of cells as well as throughout the cell?

2007-03-04 10:24:10 · 6 answers · asked by wings_of_imagination 1

2007-03-04 10:23:31 · 2 answers · asked by simply76 2

2007-03-04 09:42:43 · 1 answers · asked by Anonymous

Please respond with any help you can,this is for a science project

2007-03-04 09:32:50 · 7 answers · asked by mims1129 1

i.e number of folds, amount of villi or other structural differences. And if you can please state a source.

2007-03-04 09:25:21 · 2 answers · asked by bob c 2

http://www.bibleufo.com/humanphenom7.htm

With modern medical abilities, how long will it be before they take a "sample" dna from ancient giants, inject them in a willing human participant, & grow them enough to give a pre-mature birth (giants, are bigger you know, have to take em sooner!)

Then start re-introducing giants?

Will these creatures have souls & go to heaven since they have human dna?

Do you think the white man is a modern giant? Average is 6 ft or close to it, while midgets in other countries may be 4 foot or slightly above.

Is this what the bible meant about a land of giants?

2007-03-04 09:24:47 · 5 answers · asked by Anonymous

Explain.

2007-03-04 09:19:05 · 3 answers · asked by esrarengizbeauty 1

1) What are 3 pieces of evidence supporting intelligent design?

2) What are soe of the different viewpoints amongst those people who propose intelligent design?

3) If evolution is taught in school should we also have to teach creationism or intelligent design?

2007-03-04 09:13:36 · 8 answers · asked by nomananwar100 1

Do women have a higher average blood temperature than men? Do black people have warmer bodies than asians? I'm just curious.

2007-03-04 08:58:41 · 6 answers · asked by Link 5

wat is the formula for photosynthesis

its for 8th grade science

thanks !!

2007-03-04 08:53:14 · 3 answers · asked by Anonymous

I know not all human characteristics have an evolutionary explanation, but how might this characteristic have benefited ancient human ancestors?

2007-03-04 08:40:36 · 5 answers · asked by asthenia394 2

Frequency is increased for each trail. each trail last ten seconds and fatigue is shown each time (according to zero seconds and ten). As freq gets higher and higher, the tension starts declining dramatically. in physiological explanation, whys the tension declining?

2007-03-04 08:34:42 · 2 answers · asked by Anonymous

Does it continue to grow or does it die out? Thanks for your time and help.

2007-03-04 08:30:04 · 3 answers · asked by abc123 1

2007-03-04 08:28:15 · 2 answers · asked by Anonymous

Homeostasis refers to …
a. the tendency of the internal environment to fluctuate in response to changes in the external environment.
b. allowing the internal environment to conform to changes in the external environment.
c. regulation of the internal environment so that it is similar the external environment.
d. modification of the external environment to make it more compatible with life.
e. the maintenance of constant, ideal conditions in the internal environment.

I think it's e, but i'm not sure. Please help!

2007-03-04 08:26:41 · 4 answers · asked by Anonymous

Which one of the following is NOT part of a negative feedback mechanism that maintains homeostasis?
a. Increased excretion of Na+ ions into the urine following consumption of salty pretzels.
b. Formation of glycogen in the liver immediately following a meal.
c. Movement of the baby through the cervix during childbirth.
d. Increased rate of breathing during and after exercise.
e. Vasoconstriction in the skin during exposure to cold.

I think it might be the baby one, but I'm not sure

2007-03-04 08:25:59 · 1 answers · asked by Anonymous