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Assertion: Specialization is the reproductive isolation amongst once interbreeding population.
Reason: Genetic drift, Natural selection and Severe DNA change can cause specialization.CorrectIncorrect
Assertion: Acquired trait cannot be passed on from one generation to next generation.
Reason: Inaccuracy during DNA copying of acquired trait is minimum.CorrectIncorrect
Human offspring’s sex is determinedCorrectIncorrect
Wing of a bird and wing of an insect areCorrectIncorrect
Which concept was not included in Charles Darwin’s theory of Natural Selection?CorrectIncorrect
The remaps (or impressions) of dead animals or plant? that lived in the remote past are known asCorrectIncorrect
Natural selection is called ‘survival of the fittest’. Which of the following statements best describes an organism?CorrectIncorrect
The process by which new species develop from the existing species is known asCorrectIncorrect
The more characteristics two species have in common :CorrectIncorrect
A cross between two individuals results in a ratio of 9 : 3 : 3 :1 for four possible phenotypes of progeny. This is an example of aCorrectIncorrect
Two pink colored flowers on crossing results in 1 red, 2 pink and 1 white flower progeny. The nature of the cross is-CorrectIncorrect
Differences between organisms in a species are described as variation. Which of the following would you describe as continuous variation?CorrectIncorrect
Those organs which have the same basic structure but different functions are calledCorrectIncorrect
A man with blood group A marries a woman having blood group O. What will be the blood group of the child?CorrectIncorrect
The concept of origin of species by natural selection was given by.CorrectIncorrect
Which of the following is not correct-CorrectIncorrect
Which of the following is the ancestor of ‘Broccoli’?CorrectIncorrect
The process of evolution of a species whereby characteristics which help individual organisms to survive and reproduce are passed on to their offspring and those characteristics which do not help are not passed on is calledCorrectIncorrect
Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that-CorrectIncorrect
Process of selecting individuals with desired characters by man is calledCorrectIncorrect
Select the group which shares maximum number of common characters-CorrectIncorrect
Which of the following scientist gave the principles of inheritance?CorrectIncorrect
Assertion: Human, frog and bird have a common ancestor.
Reason: Limbs of human, bird and frog are homologous.CorrectIncorrect
Assertion: Variation is high in sexually reproducing organisms compared to asexually reproducing organisms.
Reason: Inaccuracies during DNA copying give rise to variation.CorrectIncorrect
An example of homologous organs isCorrectIncorrect
A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted asCorrectIncorrect
Wild cabbage has evolved into new varieties like cabbage, broccoli and cauliflower byCorrectIncorrect
The fossil remains of Archaeology is a connecting link betweenCorrectIncorrect
What is the difference between genetic drift and change due to natural selection?CorrectIncorrect
The theory of chemical evolution of life was experimentally demonstrated by-CorrectIncorrect