Biology - March 2007

Which of the following plays the most important role in determining which genes are turned on in a particular cell?

A. RNA binding molecules

B. DNA binding molecules

C. the proteins in the cytoplasm

D. the number of chromosomes

2007-03-24 19:55:13 · 5 answers · asked by Cindie lou 1

The gene was first thought to be a discrete factor or particle that controls a gross
character of an organism such as flower color or eye color. With the discovery of
specific relationships between genes, enzymes, and proteins, this concept has
changed radically. Cite three specific experiments that illustrate these changes
and explain our present concept of the gene.

plz help me!!!! can u just explain to me wat it is asking and atleast explain one of the experiments.
thank u

2007-03-24 19:34:49 · 1 answers · asked by biology101 1

At 4.5 weeks after fertilization, which of the following is/are present in the embryo?

A. neural tube
B. tail
C. heartbeat
D. all of the above

2007-03-24 19:32:51 · 3 answers · asked by Cindie lou 1

2007-03-24 19:19:38 · 3 answers · asked by jenny 1

Given advance supercomputers and the state of our technology, is it at all possible for us to determine how humans will evolve a couple million or billion years from now? I mean, we already have an idea of what our ancestors look like, so maybe there's a pattern or something out there for us that we can use.

2007-03-24 19:17:14 · 6 answers · asked by Michael M 1

Pepper for instance.

2007-03-24 19:11:12 · 11 answers · asked by Anonymous

When does the fertilized egg normally reach the uterus?
A. 14 days after fertilization.
B. 10 days after fertilization.
C. 5 days after fertilization.
D. 1 day after fertilization.

2007-03-24 19:09:42 · 2 answers · asked by Cindie lou 1

Why is it that when I put my finger (with soap) and dip it into a bowl of pepper, all the pepper goes to the side of the bowl??

2007-03-24 18:29:08 · 5 answers · asked by Anonymous

2007-03-24 18:03:30 · 6 answers · asked by rebekkah hot as the sun 7

2007-03-24 17:54:55 · 9 answers · asked by Anonymous

how is it affect blood sugars levels in insulin, epinephrine, and thyroxine???

2007-03-24 17:41:07 · 2 answers · asked by >() 1

I know that dogs cool themselves down by panting, and I know that they only sweat through their feet. Why did they not keep or develop sweat glands all over? Is it still beneficial?
p.s. I don't want anyone saying evolution isn't true--you can't change my mind.

2007-03-24 17:24:01 · 3 answers · asked by giraffetalk 1

In sport, will the human in future keep breaking the records of their counterparts in the past? Or, will us reach a limit for our physical biological limit? Let imagine, if there is no limitation, it means the physical capabilities can be improved and do something the past generations can't.

2007-03-24 17:23:32 · 2 answers · asked by LTC 4

Rhetorical question, please enlighten others

2007-03-24 17:07:19 · 11 answers · asked by pathpassion 1

Do worms and friut flies have vertebraes? I need some organisms other than bacteria that do not have vertabraes to learn more about. And possibly conduct experiments

2007-03-24 16:51:24 · 9 answers · asked by anikabot 2

Which is the most populous species?

2007-03-24 16:45:40 · 4 answers · asked by Rocko 3

i was just wondering if our brain is just a muscle how does it do all it does like remembering, cause emotions think or even function

2007-03-24 16:42:59 · 4 answers · asked by deadman82100 2

9/10 people seem to believe that if birds eat rice it will cause them to choke or explode. This is a myth.

How did this myth get started?

2007-03-24 16:33:16 · 2 answers · asked by bartmcqueary 3

****** are dark,chinese got yellowish skin.

2007-03-24 16:22:30 · 14 answers · asked by alvedia 1

2007-03-24 16:12:53 · 6 answers · asked by lanalang 5

I need to know how to do the calculation to estimate the size of the cell as seen through the microscope in microns. This is due on Monday and I totally forget how to do it. Thanks.

2007-03-24 16:09:49 · 3 answers · asked by Anonymous

2007-03-24 16:09:27 · 3 answers · asked by Anonymous

Just a question that dawned on me, it might be a worthwhile undertaking.

2007-03-24 16:06:37 · 3 answers · asked by nomadman14 2

It's a fact that evolutionary ideas constantly change but the bible has remained the same and is able to explain all areas of life plus has 100's of detailed prophecies that have come true down to the smallest detail. Any informed evolutionist could not deny that modern science arose from a biblical foundation, but people would rather choose mans word over God's word. The bible says that we are without excuse when we stand before God. No excuse. Stop and think about it. It doesn't matter what you believe. What matters is that what you believe is true. 100 out of evey 100 people die. We are a breath away from eternity. We are without excuse when we stand before God. We should look at all the evidence. If we look at the evolutionary side, then we must also give creation a fair investigation as well. We shouldn't gamble with our eternal lives without studying all the available facts.

2007-03-24 16:02:20 · 11 answers · asked by fourbyfourblazer 2

It's a fact that evolutionary ideas constantly change but the bible has remained the same and is able to explain all areas of life plus has 100's of detailed prophecies that have come true down to the smallest detail. Any informed evolutionist could not deny that modern science arose from a biblical foundation, but people would rather choose mans word over God's word. The bible says that we are without excuse when we stand before God. No excuse. Stop and think about it. It doesn't matter what you believe. What matters is that what you believe is true. 100 out of evey 100 people die. We are a breath away from eternity. We are without excuse when we stand before God. We should should look at all the evidence. If we look at the evolutionary side, then we must also give creation a fair investigation as well. We shouldn't gamble with our eternal lives without studying all the fact.

2007-03-24 15:59:29 · 5 answers · asked by fourbyfourblazer 2

A garden worm and a flat worm both live in moist environments and both exchange gases with their environments throught their skin. The garden worm has a circulatory system to move these gases around its body, the flatworm has no such system. Can you explain these observations given your knowledge of SA:V ratio?

**No worries people, i'm not asking for the answer, but what does this question mean? I found a garden worm in my backyard but i can't find a flatworm and i've been digging for one since this morning to find one. How do i observe it? Thank you ^ ^

2007-03-24 15:50:32 · 2 answers · asked by little.clown 2

what organ in animal that make animal notify earthquake faster compare to humans....differences between human n animal

2007-03-24 15:48:25 · 8 answers · asked by Theventharan S 1

During metaphase 1 of meiosis, homologouus chromosomes can orient thenselves such that one or the other will by chance go to a particular daughter cell in a process known as
a. segregation
b. independent assortment
c. crossing over
d. chromosomal inheritance

2007-03-24 15:26:06 · 13 answers · asked by Gee 1

Why is the theory of SA:V important to limiting cell size? Isnt the bigger the ratio the better diffused a cell is? I did an exercise where i had to build two different sized people. one was big and one was small. But they both had the same volume and different surface areas...did i measure it wrong? thank you ^^

2007-03-24 15:22:15 · 6 answers · asked by little.clown 2

2007-03-24 15:15:35 · 16 answers · asked by Anonymous