Which of the following has not been produced from wild cabbage using artificial selection process
  • Broccoli
  • Kale
  • Kohlrabi
  • Spinach
New species may be formed if (i) DNA undergoes significant changes in germ cells (ii) mating does not take place (iii) there is no change in the genetic material (iv) chromosome number changes in the gamete  
  • (i) and (ii)
  • (i) and (iii)
  • (ii), (iii) and (iv)
  • (ii) and (iv)
The number of pairs of sex chromosomes in the zygote of humans is
  • 1
  • 2
  • 3
  • 4
If the fossil of an organism is found in the deeper layers of earth, then we can predict that
  • the fossil position in the layers of earth is not related to its time of extinction
  • time of extinction cannot be determined
  • the extinction of organism has occurred thousands of years ago
  • the extinction of organism has occurred recently
A gene is
  • Hybrid
  • heritable trail
  • Pure breed
  • Part of a chromosome that transmits a trait
The theory of evolution of species by natural selection was given by
  • Morgan
  • Lamarck
  • Mendel
  • Darwin
Palaentology is the study of
  • Fossils
  • Genetics
  • Evolution
  • None of these
Which one of the following is incorrect?
  • Speciation is the evolution of reproductive isolation among once interbreeding populations
  • Fossils are the preserved traces of living organisms of remote past
  • evolution is the sequence of the gradual changes which takes place in primitive organism over millions year and new organism are formed
  • None of these
In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosome is/are (i) large chromosome (ii) small chromosome (iii) Y-chromosome (iv) X-chromosome
  • (iii) and (iv)
  • (ii) and (iv)
  • (iii) only
  • (i) and (ii)
A zygote which has an X-chromosome inherited from the father will develop into a
  • X- chromosome does not determine the sex of a child
  • boy
  • either boy or girl
  • Girl
Vestigial organs are
  • Organs reduced due to disuse
  • Organs marked only in embryonic stage
  • Primitive organs
  • Primordial organs
The fossil trilobite was originally
  • An Arthropod
  • An vertebrate
  • A reptile
  • An ave
Who is the father of Genetics
  • Darwin
  • Mendel
  • Morgan
  • None of the above
Exchange of genetic material takes place in
  • vegetative reproduction
  • budding
  • sexual reproduction
  • asexual reproduction
Statement I: Forelimbs of frog and bird are example of Analogous organs Statement II: Wings of bird and bats are example of homologous organs
  • Both the statement are True
  • Statement I is true only
  • Statement II is true only
  • Both the statement are False
select the character which can be acquired but not inherited
  • size of body
  • colour of eye
  • nature of hair
  • colour of skin
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