Q. No.Why does it is said that looking at stars on a clear night sky means looking back in time?
A. What we are seeing at that time is actually has stated its journey millions of years back
B. What we are seeing at that time is actually has stated its journey trillions of days back
C. What we are seeing at that time is actually has stated its journey thousands of days back
D. What we are seeing at that time is actually has stated its journey thousands of kilometers away
Which of the following statements are not true?
(1) The origin of life is considered a unique event in the history of universe.
(2) Earth is just a speck.
(3) Universe is almost 20 million years old
(4) Galaxies contain stars and clouds of gas and dust
Mark the incorrect statement with respect to evolution
1 When we see objects in our immediate surroundings we see them instantly and hence in the present time
2 When we look at stars on a clear night sky we are, looking back in time
3 Stellar distances are measured in kilometers
4 Huge clusters of galaxies comprise the universe
The concept of chemical evolution is based on
1. crystallization of chemicals
2. interaction of water, air, and clay under intense heat
3. effect of solar radiation on chemicals
4. the possible origin of life by the combination of chemicals under suitable environmental conditions
In Miller's experiment, he used a mixture of CH4, NH3, H2 and water vapour in a closed flask to mimic early earth conditions. What was the temperature at which this flask was kept?
(a)
(b)
(c)
(d)
Which of the following is not true about Big Bang theory?
(1) A singular huge explosion
(2) Universe expanded and temperature came down
(3) Hydrogen and Helium formed alongwith this expansion
(4) The gases condensed under gravitation and formed the galaxies of the present day universe.
Which of the following is true regarding early earth?
1. Earth was supposed to have been formed about 4.5 billion years back.
2. The atmosphere of early earth was full of water vapour.
3. The surface of earth was covered by water vapour, methane and carbondioxide, the three compounds, formed from molten mass.
4. The UV rays from the sun broke up water into hydrogen and oxygen and lighter oxygen escaped.
Oparin of…… and Haldane of ….. proposed that the first form of life could have come from pre existing …………
(1) Russia, England, non-living inorganic molecules
(2) England, Russia, living organic matter
(3) Russia, England, non-living organic molecules
(4) England, Russia, life
Which of the following statements is true?
(1) A British scientist created the conditions proposed by Oparin and Haldane in a closed flask with temperature of 800 degree Celsius in electric discharge along with gases methane, hydrogen, ammonia and water vapour and observed formation of amino acid.
(2) Some similar experimental setups were also prepared by other scientists and formation of sugar, nitrogenous bases, Pigments and Fats was recorded.
(3) The processes of chemical evolution were occurring elsewhere in space was concluded by the analysis of content of gaseous cloud.
(4) The first self replicating metabolic capsule of life arose 3 billion years back.
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