Biology - February 2007

PLEASE state scientific reason and dont write inapproapriate or stupid comments.

2007-02-12 11:52:15 · 4 answers · asked by The Mastermind 3

waht is the meaning of that and can i get an example of that plz? :)

2007-02-12 11:23:25 · 3 answers · asked by ¤AFTERN00N L0VAH¤ 2

WELL WHAT DOES PROTISTS AND BACTERIA HAVE IN COMMON?
WHAT DOES PROTISTS AND HUMAN CELLS HAVE IN COMMON?
ALSO WHAT DOES HUMAN CELLS AND BACTERIA HAVE IN COMMON?
I DONT WANT ANY WIKEPEDIS STUFF AND I EXPECET THESE QUESTINS ANSWERES!!!!

2007-02-12 10:54:07 · 3 answers · asked by anthony_izaguirre@sbcglobal.net 2

if the genotype frequencies in a popluation at genetic equilibrium are .36 TT , .48 Tt, and .16tt, what are the allele frequencies of T and t?

2007-02-12 10:51:03 · 2 answers · asked by Anonymous

2007-02-12 10:48:31 · 1 answers · asked by Greg H 2

a biologist catches 1600 moths using specail inscet traps. of this popluation, 64 exhibit the recessive penontype (bb), and 1536 the dominant phenotype (BB or Bb). assuming that this is a random sample of the wild popluation, is the popluation at genectic equililbrium? explain how you know

2007-02-12 10:39:17 · 2 answers · asked by Anonymous

if a poplulation of 2000 is at genetic equilibrium but contains only 180 individuals with the recessive phenotype (rr), what is the expected frequency of the recessive allele (r) nine genration later?

2007-02-12 10:35:58 · 4 answers · asked by Anonymous

the genotype frequencies of a poplulation are determined to be .6 AA , .0 Aa ( there are no heterozygote) and .4 aa. Its allele frequencies are p = .6 and q .4. is this poplulation at genectic wqulilbrium? why or why not?

2007-02-12 10:34:13 · 2 answers · asked by Anonymous

i just did a biology lab that went like this
-first i put 25 red and 25 yellow beads in a bag and drew them out 2 at a time
-the beads represent animals
- 2 red beads means dominant for a trait
-1 yellow and 1 red bead means recessive for a trait
- 2 yellow beads means the animal is dead
- i put all the beads except for the dead beads back in a bag and repeated the experiment for the second generation
what are the dependant and independant variable?
please help me

2007-02-12 10:31:30 · 2 answers · asked by ihearthim 2

What is the more common name for the sinoatrial (SA) node and the role in pulmonary circulation? Provide a thorough explanation. Please include link(s) if answers from a website. Thanks :)

2007-02-12 10:31:08 · 3 answers · asked by l3lackitty 1

Reproduction :

Different Adaptations (Variability)

Competition

2007-02-12 10:28:59 · 1 answers · asked by montoya162001 1

what are monomers of them. what are they in the body and what are they used for? what elements are they made of?

and the tough one for all you bio majors lol..

HOw many possible combinations of proteins are possible with 20 different amino acids?

Thanks!! 10 pts to Best answer..

2007-02-12 10:25:29 · 4 answers · asked by kevin 2

HW: Only 4% of the US population has Type AB. Your friend has type AB. Give reasons to why he should donate.

2007-02-12 10:19:00 · 4 answers · asked by Nhat t 1

if 96% of the garden peas in a popluation at genetic equlibrium are tall. what is the frequency of the dominant allele?

2007-02-12 10:18:03 · 2 answers · asked by Anonymous

I've heard brown and green, brown and blue, ect. What one is it exactly?

2007-02-12 10:12:32 · 10 answers · asked by southkakky_boi 1

I know that plant cells undergo photosynthesis. They have a cell wall, chloroplasts, is there anything else?

2007-02-12 10:09:57 · 2 answers · asked by Donovan G 5

which regulates when heating is turned on or off. In what way does the lac operon function like a thermostat?


Also.....

Biological processes often take place in a series of sequential steps called a biochemical pathway. Many biochemical pathways are controlled by feedback inhibition. In feedback inhibition, a pathway's end product affects an earlier step in the pathway and causes the pathway to stop. Explain why the lac operon in E coli is considered an example of feedback inhibition.

2007-02-12 10:09:51 · 1 answers · asked by 000123 2

Investigating the Effects of Exercise on Respiration

When you exercise, you burn up oxygen, increasing the need for it. Due to this, respiration rate increases, to obtain this oxygen. This shows a direct correlation between the intensity of exercise, and the respiration rate. As you exercise more your respiration rate will increase, and vice versa.

2007-02-12 10:08:17 · 3 answers · asked by Donovan G 5

can anyone help me...i need two reasons

2007-02-12 10:07:31 · 2 answers · asked by qwerty_123 2

2007-02-12 09:57:53 · 2 answers · asked by dimitry'sgirl 1

if 96% of the garden peas in a popluation at genetic equlibrium are tall. what is the frequency of the dominant allele?

2007-02-12 09:56:12 · 1 answers · asked by atrankid 2

in a poplulation at genetic equilibrium, the frequency of allele A is 0.5.

a) what is the frequency of the homozygous dominnant of genotype (AA)?

b) what is frequency of the heterozygous genotype (Aa)?

2007-02-12 09:54:44 · 2 answers · asked by atrankid 2

this is hard.. Tongue rolling is a dominnant trait in which a person can roll the tongue into the shape of a taco shell. In a human population of 1000, 840 are tongue rollers ( TT or Tt), and 160 are non-tongue rollers(tt). what is the frequency of the DOMINANT ALLELE (T) in the popluation?

2007-02-12 09:30:23 · 2 answers · asked by atrankid 2

2007-02-12 09:24:24 · 3 answers · asked by hockeyislife21 1

Mobility of the fragments depends on the ______of the dna fragements .______its easier for small Dna fragements to travel through the mesh of aragose molecules.

2007-02-12 09:14:48 · 8 answers · asked by ameeeeeeeeeeeeeeeet 2

2007-02-12 09:13:36 · 10 answers · asked by Anonymous

Charles Darwin's 1844 essay on natural selection shows that there is variation in inherited traits and differences in reproductive success among individuals with those traits. Darwin proposed that the combination of these two events leads to the spread of characteristics through population.

According to Darwin, how does "descent with modification" contribute to the evolution of a population?

How does selective breeding of domestic animals illustrate Darwin's theory of natural selection on a compressed time scale?

Please help me!

2007-02-12 09:06:34 · 1 answers · asked by chris102188 2

Also....
Mutations may occur in gametes or in body cells. In which cell type is a mutation likely to be a source of genetic variation for evolution, why?

2007-02-12 09:04:24 · 2 answers · asked by 000123 2

I want to understand the answer to this question. Intuitively it seems the hotter, the more calories you burn. After all, ice melts at different rates depending on ambient temp. Why wouldn't fat act the same way? And if fat does not act the same way, please explain.

2007-02-12 08:44:42 · 2 answers · asked by loudwalker 2

i question in my biology book is when a jellyfish is removed from its saltwater and placed into fresh water it swells and bursts! and then it says is a jellyfish an animal or a plant? why? (hint: think about how plants cells and animal cells react when placed in solution.) i hope there is someone that can help me! haha thanks and ahve a great day

2007-02-12 08:38:47 · 6 answers · asked by Anonymous