Biology - January 2007

I always see cells floating around in little clusters and I was wondering how it could possibly be happening.

2007-01-29 06:49:58 · 2 answers · asked by Anonymous

Which of these evolutionary processes is thought to have occurred first?

A. Simple compounds existed in Earth's early oceans and hot springs.
B. Complex molecules were produced when the Sun provided enough energy.
C. Molecules like DNA and RNA formed and later reproduced themselves.
D. Protobionts formed, followed by prokaryotic cells.

2007-01-29 06:44:29 · 10 answers · asked by Rattiesrule 2

(especially on darker skinned people)

2007-01-29 06:32:34 · 4 answers · asked by Kraljica Katica 7

Two unrelated organisms become similar in appearance and function as they adapt to similar environments. This is an example of what?

A. Homologous structures
B. Convergent evolution
C. Adaptive radiation
D. Divergent evolution

2007-01-29 06:30:40 · 7 answers · asked by Rattiesrule 2

Which of these events contributes most to the formation of new species?

A. Adaptive isolation due to competition
B. Genetic isolation through polyploidy
C. Mate selection
D. Physical isolation of populations

2007-01-29 06:19:51 · 5 answers · asked by Rattiesrule 2

I'm trying to decipher information I got from our tissue culture technician.

2007-01-29 06:16:46 · 4 answers · asked by Chris 1

2007-01-29 06:04:19 · 6 answers · asked by moorathebest 1

2007-01-29 05:57:09 · 15 answers · asked by aleX 1

my son is 9 half months hes light haired blue eyes light skin! my partner mixed black n white, im really light with redish hair blue eyes, is this common?

2007-01-29 05:47:51 · 7 answers · asked by laura h 1

Will we be hit by an asteroid? Bomb ourselves to oblivion?

2007-01-29 05:36:51 · 7 answers · asked by trer 3

The experiment involves mixing yeast cells with glucose. What would be the optimum temp. for fermentation to take place?

2007-01-29 05:21:46 · 7 answers · asked by SweetPea 3

Why does the blood (haemoglobin) take oxygen from the air and no other gases?? If the property of haemoglobin is taking the gas which is more in the atmosphere then it should take nitrogen which is the largest quantity of gas found on earth then why does it take oxygen???

2007-01-29 04:51:46 · 5 answers · asked by Anonymous

How would I set up and carry out an experiment to extract DNA from a kiwi fruit? Thank you to anyone who can help!

2007-01-29 04:46:20 · 6 answers · asked by kangaroo 4

2007-01-29 04:41:28 · 5 answers · asked by Stratomanssy 5

Colours in everyday life can clash. You've seen that red and yellow screaming at each other. Why do these colour miss matches not happen in nature?

2007-01-29 04:35:49 · 18 answers · asked by wingdray 2

2007-01-29 04:33:44 · 3 answers · asked by ♥cozicat♥ 5

2007-01-29 04:28:49 · 2 answers · asked by Indiaxo 1

Hows all skulls just have holes and spaces were the noses and ears are?

2007-01-29 04:28:09 · 16 answers · asked by Indiaxo 1

The FDA anounced that clined meat is alowed to be selled in stors without a label. i think this is wrong! Why would i want to eat cloned meat? The sheep Dolly (the first animal to be cloned) had died of an early age because (some ppl think) she was cloned. i do not think cloning is right esp not having to label the cloned meat! I mean come on ppl! that is like lieing! At least label it!!!

2007-01-29 04:23:57 · 3 answers · asked by Anonymous

Why do we have two nostrils instead of one in the middle of our noses?

2007-01-29 04:15:10 · 10 answers · asked by ladee_in_luv 2

If you don't know enough about the subject to be able to answer it without a cut+paste, how do you know the information that you are cut+pasting is correct?

2007-01-29 04:03:31 · 9 answers · asked by Nick F 6

a. have a soft body often covered by a shell made of silica
b. have a soft body covered by a mantle
c. have an externally segmented body
d. lack a larval stage
e. lack a circulatory system

2007-01-29 03:49:10 · 1 answers · asked by Anonymous

a. bilaterally symmetrical
b. similar to a cnidarian polyp
c. distinguished by eight bands of cilia
d. colonial animals
e. carnivores that use nematocysts to capture prey

2007-01-29 03:45:39 · 2 answers · asked by Anonymous

I'm looking at how ABA stimulates stomatal closure, and I get that the exact mechanism is not known, but can anyone put all the various steps in the pathway in order, especially the part hydrogen peroxide plays? Either in words or a link to a good diagram, getting confused trying to put it all together from various papers.

2007-01-29 03:30:44 · 1 answers · asked by cheetara_2001 2

2007-01-29 03:20:36 · 15 answers · asked by Kratika 1

Please, no website links, just straight up answers.

2007-01-29 03:04:30 · 1 answers · asked by Anonymous

article pls...(T.T).... thanks for helping me out......THANKYOU!

2007-01-29 02:44:43 · 3 answers · asked by Anonymous

Is it to generate heat from the friction of the bones rubbing together or the body trying not to shut down completely. It takes energy to shiver and surely in desperate times that energy is needed to keep warm.

2007-01-29 02:37:17 · 9 answers · asked by Anonymous

pertaining to taste receptors

2007-01-29 02:09:38 · 10 answers · asked by Punkin 1

what makes the human body leak tears when you cry and why do you laugh when something is funny?

2007-01-29 01:55:27 · 10 answers · asked by AARON B 1