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1.
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
2.
The fossil remains of Archaeopteryx is a connecting link between
3.
The maleness of a child is determined by
4.
Human offspring's sex is determined
5.
Wild cabbage has evolved into new varieties like cabbage, broccoli and cauliflower by
6.
Natural selection is called 'survival of the fittest'. Which of the following statements best describes an organism?
7.
Which concept was not included in Charles Darwin's theory of Natural Selection?
8.
What is the difference between genetic drift and change due to natural selection?
9.
To study the natural phenomenon of inheritance, Mendel selected the pea plants. Which of the following properties were suitable for their studies?
(i) Plants would easily self pollinate or cross-pollinate in nature.
(ii) Plants were easily grown in garden soil with a considerably shorter generation time.
(iii) Pea plants do not require the true-breeding for hybridisation experiments.
(iv) Many parts of the plant such as pod, seed, flower, cotyledons showed distinct phenotypes.
(i) Plants would easily self pollinate or cross-pollinate in nature.
(ii) Plants were easily grown in garden soil with a considerably shorter generation time.
(iii) Pea plants do not require the true-breeding for hybridisation experiments.
(iv) Many parts of the plant such as pod, seed, flower, cotyledons showed distinct phenotypes.
10.
Differences between organisms in a species are described as variation. Which of the following would you describe as continuous variation?