Biology Past Questions and Answers

In evolution, fossils are naturally preserved in

Which of the following is <b>not</b> a social insect?

<i>(a) Explain briefly how the structure of each of the following cells relate to their functions:</i><br/>(i) Sperm cell<br/>(ii) Palisade cell.<br/>(b) Make a drawing, 8cm to -10cm long of the front view of the female reproductive system in humans and label fully.<br/>(c) State two differences between reproduction in mammals and in amphibians.<br/>(d) State two methods of birth control in humans.

(a). Name the gases involved in the photosynthesis of a plant.<br/>(b) State one role each of the gases named in 2 (a).<br/>(c) (i) What is a variegated leaf?<br/>(ii)Which part of the variegated leaf would test positive when treated with iodine solution?<br/>(iii) State two reason for the answer in 2(c) (ii).<br/>(iv) Name one mineral element required by plants for the formation of the part that would test positive in 2(c)(ii).<br/>(d) The table below indicates different methods by which organism obtain food. Place the following organism under the heading in the table below: Human, Mushroom, Venus flytrap, Waterleaf plant, Tapeworm, Elephant grass, Housefly, Lichen, Spirogyra, Rhizopus. <br/><table class='tbn'>Mode of Nutrition<tbody><tr><td> Holozoic </td><td> Parasitic </td><td> Symbiotic </td><td> Saprophytic </td><td> Autotrophic </td></tr><tr><td> </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td> </td><td> </td><td> </td><td> </td><td> </td></tr></tbody></table><br/><br/><br/><br/>

<i>(a). Explain briefly the following terms: </i><br/>(i) Renewable natural resources<br/>(ii) Non -renewable natural resources; <br/>(b) Give two examples each of:<br/>(i) Renewable natural resources<br/>(ii) Non -renewable natural resources<br/>(c) State five ways of conserving forests<br/>(d) State four effects of adding animal manure to garden soil.<br/>(e) Give the possible genotypes in humans;