Q. No.Hardy-Weinberg's principle of 'zero evolution' is based on
(1) genetic equilibrium
(2) random mating
(3) no migrations
(4) All of the above
What does the term 'reproductive isolation' refers to?
(1) An individual is unable to fertilise itself
(2) Genes are not exchanged between two populations
(3) Individuals from two populations never mate
(4) Individuals form two populations never produce offsprings
Below are listed some pairs of characters. the homologous pair is
(1) forelimbs of dog and camel
(2) insect wing and batwing
(3) feathers of birds and fins of fish
(4) lens of vertebrate and arthropod
Pythons possess tiny leg bones that serve no purpose in locomotion. Such organs are
(1) homologous organs
(2) analogous organs
(3) vestigial organs
(4) Both (a) and (c)
The two critical steps in the evolution of humans were the
(1) evolution of bipedalism and the enlargement of the brain
(2) making and using tools
(3) using fire and making shelters
(4) exhibiting culture and having sophisticated tools
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
Big Bang theory attempts to explain
(1) The origin of universe
(2) The origin of Earth
(3) The origin of life
(4) The origin of environment
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.
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