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Biology Questions Question Paper

Biology Questions

Course:Secondary Level

Exam Year:2009

Instructions:Answer all the questions. 1.Name the tissues in plants responsible for: a)Transport of water and mineral salts. b)Transport of carbohydrates. c)Primary growth.(3mks) 2.Name the part of the retina where the image is formed.(1mk) 3.State two characteristics of the image formed on the retina.(2mks) 4.What is single circulatory system?(2mks) 5.Name an organism which has single circulatory system.(1mk) 6.Name the opening to the chamber of the heart of an insect.(1mk) 7.Giving a reason in each case,name the class to which each of the following organisms belong,Bean plant and Bat.(4mks) 8.State the role of digestive system in animals.(2mks) 9.State two features that ensures that the digestive system has a large surface area.(2mks) 10.In the four oclock plant,a white flowered plant was crossed with a red flowered plant.All the F1 plants had pink flowers.When the F1 plants were selfed,204 white,418 pink and 196 red flowered plants were obtained. a)What name is given to this kind of inheritance observed in the above plant?(1mk) b)Calculate the approximate phenotypic ratio obtained in the F2 plants.(3mks) c)Using letter R to represent the gene for red colour and W to represent gene for white colour,show how the F2 plants were obtained.(4mks) 11.Identify each of the following aspects of evolution described below, a)Structures that have become function less in the course of evolution.(2mks) b)The evolutionary phenomenon in which organs from common ancestral form become adapted to different ecological niche.(2mks)

Biology Questions Question Paper

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