Biology - March 2007

2007-03-21 05:52:51 · 17 answers · asked by lushpoppy 4

The left side of my face is slightly different in structure and if I cover my left side of my face and look at the right side I look nice, you can even tell in that eye. But if I cover the right side and look at the left side only, it's like a completely different soul. I look much meaner and serious.
Is this normal?

2007-03-21 05:50:20 · 7 answers · asked by Tha Most Shady 3

2007-03-21 05:43:24 · 3 answers · asked by Tina 1

Compare the fossil of crossopterygian forefine bone to terrestrial verterbrae forelimb

2007-03-21 05:33:56 · 1 answers · asked by mzg18228 1

In order to get my degree in Biology, I had to read Origin of the Species three times-
Once in Intellectual Heritage (about 30% of it)
Once in Evolution (the whole thing, although this was an elective)
Once in Genetics. (about 50% of it.)

In order to graduate from High School, I had to read it completely twice, once for Bio, and once for English.

So, that's five times for me. I'm reading it again for pleasure right now and to help my son pass bio in his high school.

The reason I ask this is that I find it very hard to believe some very educated people have read it, based on some of the wacky stuff they claim is in it, so I wonder if I just had a unique experience in being required to read it so many times...

I was a classics minor, and this led to me reading Oedipus Rex about five times, too, but I don't usually hear people claiming that is about anything not in it.

2007-03-21 05:29:49 · 8 answers · asked by LabGrrl 7

2007-03-21 05:25:35 · 2 answers · asked by WEHA 3

do butterflies have a liquid similar to our blood? do ants?

2007-03-21 05:11:23 · 8 answers · asked by sara 1

2007-03-21 05:05:37 · 3 answers · asked by WEHA 3

specifically: Predators, relationships with environment and other animals, connections and contributions to man, outstandint features (i.e. first to hunt, first to have complete digestive tract, ect.), amazing facts, and movement. THANKS!

2007-03-21 04:55:10 · 2 answers · asked by ? 2

2007-03-21 04:44:52 · 7 answers · asked by Anonymous

2007-03-21 04:39:17 · 2 answers · asked by Anonymous

2007-03-21 04:32:54 · 2 answers · asked by Anonymous

How much human life can the Earth support? Does anyone think that the current growth rate of the population will become a problem any time soon? The forest has a carrying capacity for animals, so it seems that the Earth would have a limit to how many people it can support.

2007-03-21 04:30:32 · 5 answers · asked by kyeann 5

indicate what type of nucleic acid is most likely found in each species.
Is it double-stranded or single-stranded?
Explain your answer.

Species (1)

Adenine 30%
Guanine 20%
Thymine 30%
Cytosine 20%
Uracil 0%

Species (2)

Adenine 21%
Guanine 29%
Thymine 0%
Cytosine 29%
Uracil 21%

Species (3)

Adenine 29%
Guanine 21%
Thymine 20%
Cytosine 30%
Uracil 0%

Species (4)

Adenine 26%
Guanine 25%
Thymine 24%
Cytosine 25%
Uracil 0%

Species (5)

Adenine 18%
Guanine 30%
Thymine 0%
Cytosine 18%
Uracil 34%

The answer I came up with was the following:

(i) single stranded DNA
(ii) single stranded RNA
(iii) single stranded DNA
(iv) double stranded DNA
(v) single stranded RNA

The logic I used is when you match the A-T (or A-U in RNA) and G-C, they sum up to 50 if they are double stranded otherwise it is single stranded which base composition doesn't matter. Is that correct or am I getting it wrong?

2007-03-21 04:15:57 · 3 answers · asked by Anonymous

Shouldn't evolutionary forces have given us an urge not to itch? That is, those that itch are more likely to get sick and die (infection perhaps?) and not have offspring who also itch. Meanwhile those without this itching urge live on to have non-itching children.
Maybe itching is actually the thing to do, maybe it's good for you after all?

2007-03-21 04:14:54 · 7 answers · asked by mkrueger 1

2007-03-21 04:05:21 · 4 answers · asked by shigure 1

A. It shuts down synthesis of bacterial cell walls.
B. It sits on the ribosome and inhibits protein synthesis.
C. It blocks the cell cycle by shutting down mitosis.
D. It causes cellular respiration to stop.

2007-03-21 03:50:57 · 3 answers · asked by jessica_stay 1

2007-03-21 03:38:51 · 11 answers · asked by gem 1

The redness and heat seen in an inflamed area are the result of
A) vasoconstriction
B) increased blood to flow the area
C) phagocyte mobilization
D) production of interferon
E) a reddish substance released by erythrocytes

Which of the following characteristics are most consistant with adaptive immunity?
A) constant response tio each exposure
B) specificity
C)memory
D)increased response to second and subsequent exposures
E)specificity, memory and increased response to second and subsequent exposures ( think this one is right)

2007-03-21 03:37:05 · 4 answers · asked by Anonymous

Active natural immunity occurs when
A) antibodies pass from a pregnant mother to her fetus
B) antibodies are injected to a host
C) an individual develops a disease
D) a person is vaccinated
E) antibodies are passed in breast milk


Cells that process antigen and present these antigens to other immune cells are called
A) plasma cells
B) antigen-presenting cells
C) B receptor cells
D) T suppressor cells
E) antibodies

2007-03-21 03:33:44 · 1 answers · asked by Anonymous

but i do find some myself...

The intense inflammator response seen in poison ivy is due to activty of the
A) cytotoxic T cells
B) plasma cells
C) delayed hypersensitivity cells
D) macrophages
E)mast cells

The HIV virus infects
A) B cells
B) cytotoxic T cells
C)suppressor T cells
D) helper T cells
E) monocytes

2007-03-21 03:30:41 · 1 answers · asked by Anonymous

I have to submit the idea for a student project in an analytical chemistry course. The project is about bioprospection which is the use of substances derived from living organisms for commercial or even everyday purposes. We are avoiding anything related to the medical field because this is beyond the scope of the course. Some students have already proposed ideas such as the production of perfumes or even dyes ... If you have other interesting ideas about the subject, this would REALLY help. Thanks!
Also, if you know about interesting scientific websites that could help in such topics, feel free to share them with me...

2007-03-21 03:27:30 · 2 answers · asked by r 1

There are over ten million species, yet only several thousand types of fossils. Big disconnect, no? There must be transitional species that died out because they weren't the fittest? Evolution, maybe is not the big idea that scientists think it is?

2007-03-21 03:08:18 · 5 answers · asked by Anonymous

Which of the following would be classified as an innate mechanical mechanism?
A) activation of complememt
B) phagocytosis of invading organisms
C) washing action of tears and saliva
D) inflammation
E) release of histamine

Antibodies
A) play a large role in cell-mediated mmunity
B) are composed of four light and four heavy polypeptide chains
C)are not specific, but act generally
E) have a variable region that binds to a specific antigenic determinant

2007-03-21 03:06:10 · 4 answers · asked by Anonymous

Another nail in the coffin of evolution? There are over ten million species, yet only several thousand types of fossils. Big disconnect, no?

2007-03-21 03:04:10 · 1 answers · asked by Anonymous

2007-03-21 03:00:01 · 3 answers · asked by Anonymous

Which of the following might occure after a helper T cell is presented with a processed antigen and interacts with a B cell?
A) Helper T cells destroy the presenting cell
B) Helper T cells produce antibodies
C) Helper T cells release interleukins that stimulate B cells to clone
D) Helper T cells stop division
E) Helper T cells lyse

Several days after an initial contact with an antigen, antibody titer increases. This is a
A) primer response
B) primary response
C) precipitatin response
D) principle response
E) cascade response

2007-03-21 02:13:09 · 2 answers · asked by Anonymous

Which is the proper order of events in cell-mediated immunity?
1)cloning of cytotoxic T cells and memory T cells
2) antigen presented to T lymphocyte
3) activation of T lymphocytes
4). cytotoxic T cells attack target cells

anddd

The MHC class I antigen complex displays a forgeign antigen on the cell surface. This prompts the immune system to destroy?
A) B cell clones
B) extracellular antigens
C) the displaying cell
D) mature red blood cells
E) the virus inside the cell, but not the cell

2007-03-21 02:09:03 · 3 answers · asked by Anonymous

2007-03-21 01:38:33 · 4 answers · asked by Terrance S 1

2007-03-20 23:48:41 · 2 answers · asked by Starfish 2