Biology - March 2007

2007-03-23 16:57:51 · 7 answers · asked by Patricia M 1

I have never heard a single scientist validate this number and most say it is way off, that the true percentage is probably at least 50% or more. So where did this idea come from?

2007-03-23 16:30:08 · 7 answers · asked by Don't Fear the Reaper 3

are called:

a. tendons
b. menisci
c. ligaments
d. bursae

2007-03-23 16:23:17 · 4 answers · asked by mitch 1

a) plasmid is formed
b) vector is selected
c) DNA is copied
d) genes or proteins are harvested

2007-03-23 16:19:13 · 1 answers · asked by passion2share 4

Equipment needed and method please.

2007-03-23 16:00:08 · 4 answers · asked by Daniel/Laura Black. 2

weird aliens?

2007-03-23 15:57:42 · 13 answers · asked by Tony M 1

a. from the epiphysis to the diaphysis

b. from the diaphysis to the epiphysis

2007-03-23 15:47:25 · 3 answers · asked by M_J 1

What factors would serve as stimuli for erythropoiesis?

1. Hemorrhage
2. Aerobic exercise
3. Living at a high altitude
4. Breathing pure oxygen

Would it be 3 and 4? Thanks for the help.

2007-03-23 15:44:39 · 1 answers · asked by shih rips 6

a saddle joint?

a.scaphoid of the index finger & triquetral of middle finger
b. trapezium of carpal bone & thumbs metacarpal
c.scaphoid of middle finger & lunate of the index finger
d.trapezium of the ring finger & capitate of the fourth finger

2007-03-23 15:13:54 · 3 answers · asked by M_J 1

What eye color would you say this is?

http://img267.imageshack.us/my.php?image=eyecolorislf0.png

2007-03-23 14:46:43 · 11 answers · asked by Anonymous

2007-03-23 14:30:50 · 3 answers · asked by Jessica 4

2007-03-23 14:28:06 · 2 answers · asked by Anonymous

i hink its yes but why?

2007-03-23 13:57:33 · 19 answers · asked by lilbutterfly555 1

im doing a 3D heart model, i need to turn in for school tomorrow im doing all right on the front but i dont know what the hell goes on the back of the heart can someone who has done this tell me a site where i can find it or a link to the picture...please help ive got to turn it in for tomorrow!!!!!!!

2007-03-23 13:35:55 · 3 answers · asked by Anonymous

Using T and t as the alleles, what is the dwarf plant's genotype? How could you learn the tall plant's genotype? this is really difficult for me

2007-03-23 13:17:01 · 5 answers · asked by lilbutterfly555 1

2007-03-23 12:59:54 · 5 answers · asked by Anonymous

cytokines are soluble mediators that act as activators on certain phagocytic cells like Blymphocytes,Macrophages etc during specific immune responses.

2007-03-23 12:49:26 · 1 answers · asked by bright e 1

Please give a simple and correct answer.

2007-03-23 12:48:29 · 7 answers · asked by Nikki Monique 2

let's say i find that a certain mutant form of amyloid protein develops into alzheimer's related plaques later in life. what good can i do with that knowledge besides being able to prenatally screen for that gene or providing better genetic counseling? please be detailed,, thanks!

2007-03-23 12:31:41 · 1 answers · asked by need help! 3

Knowing that all organisms need to reproduce in order for their species to survive, wouldn't a "gay gene" cause homosexuality to be phased out because of lack of reproduction? If so, how does this "gay gene" continue to survive? Is homosexuality a matter of genetic predisposition or is it a matter of choice of the organism ?

2007-03-23 12:21:55 · 15 answers · asked by Anonymous

What are some other major biotechnollogy or pharmacitucal companies in the USA besides Genentech?

2007-03-23 11:59:07 · 2 answers · asked by Lady T 3

It is said that the body temperature of reptiles and amphibians changes according to the environmental temperature. Does this imply that their body temperature is always the same as environmental temperature and they won't feel hot or cold?

2007-03-23 11:47:47 · 6 answers · asked by clarinetmystic 1

Which one of the following statements about antigen-presenting cells is false?

a. Class I MHC molecules displaying bound peptide antigens are recognized by helper T cells.
b. Macrophages play a key role in initiating a secondary immune response by presenting antigens to memory helper T cells.
c. More cells express class I MHC proteins than class II MHC proteins.
d. Dendritic cells express both class I and class II MHC proteins on their surfaces.

2007-03-23 11:11:26 · 1 answers · asked by Anonymous

Which one of the following statements about inflammation is false?

a. Histamine released from mast cells causes relaxation of smooth muscle in the walls of arterioles, which increases local blood flow.
b. Delivery of oxygen and nutrients is aided by increased fluid flow through inflamed areas.
c. Neutrophils accumulate in the extravascular space in inflamed areas.
d. In inflamed areas, the reuptake of fluid into capillaries due to the osmotic pressure of plasma proteins is increased.

2007-03-23 11:10:55 · 5 answers · asked by Anonymous

Which one of the following is not one of the body’s nonspecific defense mechanisms?



Secretion of tears containing lysozyme.
Natural killer cells attacking virus-infected cells.
Secretion of mucus by vaginal epithelial cells.
Secretion of histamine by mast cells.
Binding of antigens to B-lymphocyte receptors.
Eosinophils attacking parasites.

2007-03-23 11:10:26 · 2 answers · asked by Anonymous

2007-03-23 11:04:54 · 9 answers · asked by albert m 1

2007-03-23 11:03:15 · 5 answers · asked by albert m 1

Hey I was doing a project on color blindness and I was just wondering how color blind people see a rainbow

Thanks :)

2007-03-23 10:59:58 · 5 answers · asked by VMars 2

Evolution by Natural selection does not change the characteristics of the individual but of the population.True or false.

2007-03-23 10:37:14 · 11 answers · asked by vanessa velasquez 1

a.) red blood cells
b.) plasma
c.) white blood cells
d.) platlets

2007-03-23 10:31:44 · 4 answers · asked by AJ 2