Biology - May 2007

2007-05-22 04:57:04 · 3 answers · asked by godrics 2

How can I dilute 1 microgram cDNA into a concentration of 2 nanograms?

2007-05-22 04:46:11 · 3 answers · asked by answers4evry1 2

2007-05-22 02:45:35 · 6 answers · asked by FNF 1

2007-05-22 02:26:28 · 19 answers · asked by Anonymous

2007-05-22 02:05:34 · 8 answers · asked by Anonymous

2007-05-22 00:26:50 · 2 answers · asked by Anonymous

there are some things i don't understand about evolution.

one, how do complex systems, such as vision, evolve? like, isn't the visual system composed of a plethora of moving parts like rods and cones and lenses? if the visual system doesn't work without so many different parts working together, then how would the ability to collect and interpret visual stimuli ever get off the ground?

two. if a creature develops a beneficial genetic mutation, why doesn't it require a mate with the same mutation to reproduce this trait? what determines whether a mutation becomes a dominant trait?

2007-05-21 21:02:27 · 10 answers · asked by Anonymous

I was wondering, if a woman who had breast enlargement was buried would you be left with a silicon pads on top of a skeleton?

2007-05-21 20:48:34 · 13 answers · asked by Charlene 2

2007-05-21 19:20:44 · 2 answers · asked by shanky 1

2007-05-21 19:19:07 · 3 answers · asked by Anonymous

Could someone please explain in detail how endosymbiosis led to the formation of eukaryotic organelles. Also why is a standard cladogram inadequate to illustrate the ancestry of a species that arises from endosymbiosis? Thank You Very Much.

2007-05-21 19:02:50 · 3 answers · asked by Anonymous

help, please!

2007-05-21 18:48:27 · 4 answers · asked by Anonymous

2007-05-21 18:20:39 · 8 answers · asked by Nelly 1

in relation to biology....plants

2007-05-21 18:10:06 · 3 answers · asked by ? 1

Hi, doing a report on the senario that Alice, in Alice in Wonderland , a 10 year old girl, shrinks to 1/100 of her size and ventures down a rabbit hole into the ground, where she discovers a new fantasy world. Remembering that Alice is a warm-blooded human being, what type of physiological adaptations would be needed to allow her to continually function normally uninterrupted so she can run, romp, and play with all her new friends and activities? Can you name any physiological adaptations and explain them in the anatomical sense, using examples from the major systems of the body? Thanks, need some help with this.

2007-05-21 17:10:32 · 1 answers · asked by MiMiMe 2

2007-05-21 16:45:31 · 2 answers · asked by Crystal Joy G 1

These are the areas and i have to match them to their corresponding activities:
a proximal convoluted tubule,
distal convoluted tubule,
collecting duct,
descending limb of loop of nephron,
ascending limb of loop of nephron,
glomerular capsule,

the activities are:
glucose is reomved from the nephron,
creatinine enters the nephron,
uric acid enters the nephron,
salt is actively transported out of the nephron,
urine collects,

can you help me match up the sites to the activities???
thanks

2007-05-21 16:34:53 · 2 answers · asked by Anonymous

Good answer

2007-05-21 16:27:40 · 3 answers · asked by simwaikit 2

2007-05-21 16:05:42 · 4 answers · asked by Anonymous

help i have a science paper due and i need to know what chloride levels are healthy!!!

2007-05-21 15:47:55 · 3 answers · asked by Ema 2

1)Both lipids and carbohydrates are important in animal cells because both
a)store energy
b)contain nitrogen
c)form cell walls
d)provide insulation

2)many generation,unrelated or distantly related species may come to resemble each other due to
a)similar environmental factors
b)similar genetic mutations
c)homologous structural adaptations
d)competition with each other

3)bilogy class of 24 students decies to measure height of each student and then calculate the average height for the class.which of these is a possible source of error in this activity?
a)accuracy of making and recording measurements
b)total number of students in the class
c)the number of males and females in the class
d)difference in the ages of the students in the class

2007-05-21 15:35:52 · 7 answers · asked by Anonymous

I know that fraternal twins share no more genetic material than regular siblings do, but why do some of them look so much alike (like Mary Kate and Ashley Olsen for example)? I have never seen regular siblings that look so much alike.

2007-05-21 15:29:56 · 8 answers · asked by MissM 6

Ok this is about reproduction in mosses - can you just tell me what this means??

When the zygote germinates, it produes a diploid sporophyte. As it grows, the sporophyte is supplied with water and nutrients by the gametophyte. Moss sporophytes cannot live independent of the gametophyte. Moss sporophytes cannot live independent of the gamtophyte from which they grow. This is one way in which bryophytes differ from all other land plans. The mature sporophyte is composed of a "foot" that remains stuck in the gametophyte - a long stalk - and a capsule that looks like a salt shaker. Inside the capsule, haploid spores are produced by meiosis. When the capsule ripens, special pores- and in some cases the whole top of the capsule - open. The spores are shaken out, to be carried off by wind and water.

THANKS SOOO MUCH 4 READIN!

2007-05-21 14:17:11 · 1 answers · asked by Prettyinpink 2

I. Enzymes are proteins. II. An enzyme increases the activation energy of a chemical reaction. III. Enzymes speed up chemical reactions.

2007-05-21 13:23:00 · 5 answers · asked by Meggy 2

I'm a student and am caught between whether I believe in the thoery of evolution or creationism. I know there are legitimate facts to prove each one, but I would be interested to hear your thoughts. I know that it is possible to believe in both and I think that that is where i am at right now.

2007-05-21 12:36:17 · 18 answers · asked by Anonymous

i am having a very hard time in science and i dont really understand anything and none of it is my text book
thanks

type of reproduction that requires the joining of two sex cells?

the type of reproduction that produces a new organism; with identical chromosomes to those of the parent organism?

the process that produces haploid sex cells?

what cell forms when an egg and a sperm join?

the sections of DNA that contain instructions for producing specific proteins?

thank you sooo much!!

2007-05-21 09:55:03 · 11 answers · asked by Anonymous

2007-05-21 09:54:46 · 5 answers · asked by truth sleuth 7

For a Science booklet but I wanted to see what other people said. or had to say on how we respond to it.

2007-05-21 09:54:43 · 2 answers · asked by angelwithin 1

2007-05-21 09:52:26 · 4 answers · asked by Anonymous

If we always remove them anyway, why do we have them in the first place? I am looking for a scientific explanation for this

2007-05-21 09:45:38 · 6 answers · asked by Ruby 6