The factor that leads to Founder effect in a population is: [NEET 2021]
Which of the following refer to correct example(s) of organisms which have evolved due to changes of the environment brought about by anthropogenic action? [NEET 2020]
(i) Darwin’s Finches of Galapagos islands.
(ii) Herbicide-resistant weeds
(iii) Drug-resistant eukaryotes.
(iv) Man-created breeds of domesticated animals like dogs.
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In a species, the weight of a newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 o r 4.5 to 5 kg die. Which type of selection process is taking place? [NEET 2019]
The similarity of bone structure in the forelimbs of many vertebrates is an example of [NEET 2018]
Genetic drift operates in [NEET 2016]
Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from nonliving matter?
[2005]
Which one of the following phenomena supports Darwin’s concept of natural selection in organic evolution?
[2005]
Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originate as adaptation. These imprints need to be used
[2005]
De Vries gave his mutation theory on organic evolution while working on:
[2005]
Which one of the following amino - acid was not found to be synthesized in Miller's experiment ?
[2006]
Jurassic period of the mesozoic era was characterised by
[2006]
Evolutionary history of an organism is known as
[2006]
An important evidence in favour of organic evolution is the occurrence of
[2006]
Which one of the following is not a living fossil?
[2006]
When two species of different genealog y come to resemble each other as a result of adaptation, the phenomenon is termed
[2007]
Among the human ancestors the brain size was more that 1000 cc in
[2007]
Which one of the following statement is correct?
[2007]
The concept of chemical evolution is based on
[2007]
The finches of Galapagos islands provide an evidence in favour of
[2007]
What is common between parrot, platypus and kangaroo?
[2007]
Which one of the following is a matching pair of a body feature and the animal possessing it ?
[2007]
What is common to whale, seal and shark?
[2007]
Industrial melanism as observed in peppered moth proves that
[2007]
Adaptive radiation refers to
[2007]
One of the important consequences of geographical isolation is
[2007]
Which one of the following in birds, indicates their reptilian ancestry?
[2008]
Darwinism finches are an excellent example of
[2008]
Thorn of Bougainvillea and tendril of cucurbita are example of
[2008]
Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?
[2008]
Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?
[2008]
33 docs|83 tests
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33 docs|83 tests
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