Biology - October 2007

distant past. Some types of flowers have five pedals. Reminds me that most animals, higher forms of animals, also have five "growths" coming off of their main body, a head, two arms, and two legs. Does this mean that we and the five pedal flowers came from the same "root" on the tree of life?

2007-10-15 04:43:40 · 5 answers · asked by Bluebeard 1

2007-10-15 04:38:14 · 19 answers · asked by Jill 2

A. Clean the impurities from the wheat germ.
B. Soften the fats in the nuclear membrane so the DNA can be released.
C. Create a foam to activate the movement of the DNA.
D. Break down the enzymes in the nucleus that affect the DNA.

2007-10-15 04:34:31 · 3 answers · asked by Anonymous

A. Clean the impurities from the wheat germ.
B. Break down the enzymes in the nucleus that affect the DNA.
C. Open up the nucleus so the DNA can be released.
D. Separate the DNA out of the solution so it can be seen.

2007-10-15 04:33:23 · 2 answers · asked by Anonymous

2007-10-15 03:57:48 · 4 answers · asked by akil_1103 1

2007-10-15 01:50:04 · 2 answers · asked by Karen F 1

Why does the combustion of sugar in laboratory does not need to be controlled by an enzyme whereas the same chemical reaction within the human body does?

2007-10-14 23:38:48 · 13 answers · asked by ArabianFalcon 2

ATP has 3 phosphates (correct me if i'm wrong), for an endergonic reaction to occur (usually related to proteins, yeah?) the ATP loses a phosphate and becomes ADP. The phosphate bonds with the protein and gives it energy for it to "work". After the protein did what it had to do, the phosphate breaks away from the protein. Where does this phosphate go? Does it go back to an ADP and bond with it again? Wouldn't that require a lot of energy as well (cause I thought the energy is already used up by the protein)? My textbook says it's a cycle where ATP --> ADP and ADP --> ATP, but how does that even work?

oh and, correct me if i said anything wrong or confusing, thanks

2007-10-14 23:06:14 · 2 answers · asked by Crammels 2

2007-10-14 22:36:40 · 5 answers · asked by Anonymous

I'm interested to know peoples' opinions of the possibility of genetic modification of fertilised human eggs to remove genetic defects and such. (this is assuming that one day we have the technology to modify it and know the outcome)

Would you have issues with this if it became common practice?

My opinion (please don't see this as answering my own question, this is merely an opinion) is that since mankind is no longer truly effected by natural selection, it should be our responsibility to effectively move the species forward - removing hereditary diseases and conditions from the genome and such.

Your thoughts?

2007-10-14 22:25:41 · 4 answers · asked by Anonymous

Well on my part, i dont believe him but there are things that tells me that his theory has bases...

2007-10-14 22:17:56 · 13 answers · asked by Anonymous

I am having a hard time w/ this one.. thanks!

2007-10-14 19:13:04 · 2 answers · asked by Anonymous

husband had a vasectomy before we met. We would like to have a child. We just want to see if he has any little swimmers at all.

2007-10-14 18:42:32 · 6 answers · asked by Anonymous

Will humans ever evolve into an entirely new species? If so, when, and why would it happen? Will our bodies change over hundreds of thousands of years of industrialized life?

I predict intensive genetic engineering in the relatively near future (in terms of the history of science) and the creation of hybrid humans/machines in the more distant future (the next few centuries) if progress continues at this rate.

2007-10-14 18:35:53 · 11 answers · asked by SPQRCLAUDIUS 2

Does anyone know if worms have external fertilisation or internal fertilisation? Also, is their reproduction sexual or asexual? Thanks!

2007-10-14 16:42:39 · 1 answers · asked by Rozyyy 1

On what side of the membrane are Na + ions released from the pump?

On what side of the membrane are K + ions released from the pump?

I don't understand what they mean by side, and where you look from your eye.

2007-10-14 16:14:23 · 4 answers · asked by Anonymous

1. in most classification systems, _____________ is the broadest taxon.

2007-10-14 15:58:04 · 4 answers · asked by Anonymous

1. the two word term that comprises the scientific name Homo sapien is an example of_____________?

2. Scientific names for made of a(n) _______ and a species?

3. A(n) __________ Guides users to the identifications of an organism.

4. Members of the ______________ Aves are birds.

2007-10-14 15:43:09 · 3 answers · asked by Anonymous

2007-10-14 15:22:55 · 3 answers · asked by Terri L 2

2007-10-14 15:13:01 · 3 answers · asked by Terri L 2

I'm totally serious. I just finished watching the Little Mermaid, and I'm really curious now.

2007-10-14 15:12:44 · 4 answers · asked by Björn M 1

2007-10-14 15:11:00 · 3 answers · asked by Terri L 2

2007-10-14 15:09:50 · 4 answers · asked by Terri L 2

2007-10-14 15:09:03 · 1 answers · asked by Terri L 2

2007-10-14 12:53:11 · 5 answers · asked by Anonymous

and my another is what`s diffrance between cadillac eldorado75 and cadillac eldorado fleetwood 75?

2007-10-14 12:01:39 · 1 answers · asked by Anonymous

-What happens to the components of water molecules that are split during light reaction?
-Hows ATP synthesized in photosynthesis? What is this process?
-What are the different roles of photosystem 1&2?
-What happens to lost electrons of photosystem 2&1?
-How does the function of the chloroplast relate to its structure?
-A molecule that absorbs certain wavelengths of light & reflects others is called a _____
-What are the 2 energy containing products of light dependent reactions?
-_____ is the protein that adds a phosphate group to ADP
-The splitting of water releases_____
-The synthesis of ATP is a process called _____
-The energy storage molecule used by most organisms is the_____
-_____ is the protein in the _____ membrane that adds a phosphate group to ADP
-The abundance of oxygen in earths atmosphere is a result of ______
-By allowing protons to cross the thylakoid membrane, ATP synthase functions as a _____& by catalyzing the synthesis of ATP it functions as a _____

2007-10-14 11:41:25 · 5 answers · asked by me 1

and is it a metaphor for my life?

and can you explain that duplicate gene different protein thing to me?

2007-10-14 11:11:26 · 6 answers · asked by wild_eep 6

Please help me with the following question:) What was the purpose of tube A?
Please help me with the following question:) What was the purpose of tube A?

Procedure:
1. Prepare a stock albumen solution by adding the white of one egg to 100 mL of distilled water in a beaker. Stir until the albumen is in solution.

Place 5 mL of the albumen solution into each of four test tubes. Label the tubes A,B,C,D

Tube A- Let stand at room temperature. Measure the temperature. Determine the pH with pH paper.
Tube B - Heat the tube in a boiling water bath for 10 minutes.
Tube C - Add 2 mL of 1M HCI. Determine the pH of the solution.
Tube D - Add 5 drops of 2% AgNO3 (a salt of the heavy metal silver).

My Observations

Tube Temperature pH appearance
A 21 degrees 7 clear colourless solution
B 100 degrees 7 opaque, white substance
C 21 degrees 2 opaque, white substance
D 21 degrees 7 opaque, white substance

I have been stumped on this question for the last several days
Thanks

2007-10-14 11:08:48 · 2 answers · asked by Mark F 1

Q.1: Why are protease secreted in an inactive form and then activated only when they reach their site of action??

Q.2: Using the digestion of maltose and dipeptides as examples explain what is meant by intracellular digestion.

please help!!

2007-10-14 10:30:04 · 1 answers · asked by x.T.x 3