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  #91  
Old Monday, August 10, 2009
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Originally Posted by Ms. Lily
No new question..........!!!!


Who proposed the chemical evolution of life?

1. Darwin
2. Lammarck
3. Oparin
4. Haechel


Plz post next question after answering this
Aristotle said that living things evolve from non living things. Just as you see flies and maggots around a decaying food. This was approved by Van Helmont. But then some scientists like Francisco Redi, Spallanzani, Louis Pasteur disapproved it. They proved that such kind of things never happen.
Then Oparin and Haldane, two independent scientist suggested the chemical evolution of life. This theory was then proved by Stanley Miller and Urey with their famous experiment.
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  #92  
Old Wednesday, August 12, 2009
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Quote:
Originally Posted by Saqib Riaz
@wshaikh

Well i think that at night plants absorb the oxygen.
So sleeping under the tree is dangerous because plants absorb oxygen which can be sufficient for a man so that's why it is prohibited to sleep under the tree at night.




Correct me if i am wrong

Regards
no sir u r absolutely right actully at night photosynthesis process (in which carbon dioxide is used and plants exile oxygen ) is not occuring so at night plants use only oxygen 4 respiration and exile carbon dioxide so its dangerous

Quote:
Originally Posted by Saqib Riaz

Next Question is

Eugenics is the study of

a. Altering humans beings by changing their genetic components
b. People of European origin
c. Different races of mankind
d. Genetics of plants

Regards
i think so option A is write ans ------- am i right?

Altering humans beings by changing their genetic components is called eugenics


next ques is
if we heat up an iron spring from a side even it get red ---y the otherside is not getting red or heat up? what is the reason?
Last edited by Princess Royal; Wednesday, August 12, 2009 at 02:43 PM.
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  #93  
Old Tuesday, August 18, 2009
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Question
What's the highest temperature ever recorded on Earth? and Where is the Hottest Place on Earth?
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  #94  
Old Tuesday, August 18, 2009
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Quote:
Originally posted by Ms.Lily
What's the highest temperature ever recorded on Earth? and Where is the Hottest Place on Earth?
What's the highest temperature ever recorded on Earth?

The biggest scorcher ever noted was on September 13, 1922, in El Azizia (also known as Al 'Aziziyah), Libya, when the mercury hit 136 degrees Fahrenheit. El Azizia is near the Sahara desert, so it's no wonder the place gets so hot. Temperatures have likely gotten even hotter in the actual desert, but weather stations aren't there to record it.

California's Death Valley had the second-highest temperature. This desert area hit 134 degrees Fahrenheit in 1913. Like the Libyan city, Death Valley is in a mid or low latitude, which gets far more direct sun than the areas above 45 degrees north or south.

Where is the Hottest Place on Earth?

The Hottest Place on Earth ever recorded was El Azizia in Libya.

Correct me if i am wrong.

Regards
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  #95  
Old Tuesday, August 18, 2009
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Default Answer These Questions
1.Why are the rear tires of a tractor bigger than the front tires?

2.What is the 'highest' degree?

3.What is total charge?

4. Why do chilli peppers change colour when they go ripe?

5. How old is a cat when it first gets to make an adult sounding meow?


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  #96  
Old Monday, March 28, 2011
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Quote:
Originally Posted by Ms. Lily View Post
Density

Unlike most other fish, sharks have no:

A) Bones
B) Teeth
C) Gills
D) Liver
correct answer is bones
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