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Discuss the adaptations of the following plants to their various habitats.
i) Xerophytes
ii) Mesophytes
iii)Halophytes
iv) Hydrophytes
Date posted:
April 30, 2018
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Describe the evidences of organice evolution.
Date posted:
April 30, 2018
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What makes diseases caused by viruses and bacteria hard to treat?
Date posted:
April 29, 2018
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How are leaves of mesophytes adapted to their functions?
Date posted:
April 28, 2018
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Why is it advisable to feed 100kg of grain to man instead of using it to fatten steers then supply beef to human population?
Date posted:
April 28, 2018
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Explain how saliva is important in digestion.
Date posted:
April 28, 2018
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Name one main cause of global warming.
Date posted:
April 28, 2018
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What is the importance of saprophytic fungi and bacteria in an ecosystem?
Date posted:
April 28, 2018
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Describe how the belt transect can be used in estimating the population of a shrub in a grass land.
Date posted:
April 28, 2018
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50 black mice and 50 white mice were released in an area inhabited by a pair of owls. After four months, the mice in the area were recaptured and only 38 black mice and only a white mice remained.
a) How would you explain these results?
b) Name the theory of evolution that support the results in (a) above.
Date posted:
April 28, 2018
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State two most important factors that favour exponential growth of a population of gazelle in a park.
Date posted:
April 28, 2018
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(i) Adaptive radiation
(ii) Convergent evolution
(iii) Mutation
Date posted:
April 28, 2018
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Name two organelles in plants that can be seen under low power objective lens
Date posted:
April 27, 2018
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Describe the pumping mechanism of the heart
Date posted:
April 25, 2018
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Discuss five factors influencing photosynthesis.
Date posted:
April 25, 2018
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Describe how natural selection brings about adaptations of a species to its environment.
Date posted:
April 25, 2018
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Explain why the companion cells are located next to the sieve tubes.
Date posted:
April 24, 2018
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Identify the external features of plants considered in classification
Date posted:
April 24, 2018
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What causes cancer?
Date posted:
April 24, 2018
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What is the difference between artificial classification and modern classification
Date posted:
April 24, 2018
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Name the organelle that performs each of the following functions in a cell.
(a) Transport of packaged glycoproteins
(b) Destruction of worn out cell organelles
(c) Synthesis of proteins
Date posted:
April 24, 2018
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Why is it advisable for a woman to donate blood after every 3 months while a man can donate blood after every 4 months?
Date posted:
April 24, 2018
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Explain how a leaf is tested for starch.
Date posted:
April 23, 2018
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Explain the biotic factors affecting distribution of organisms
Date posted:
April 22, 2018
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Describe how semicircular canals perform their functions
Date posted:
April 21, 2018
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Discuss the apparatus used in specimen
Date posted:
April 21, 2018
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What is the difference between growth and reproduction?
Date posted:
April 21, 2018
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Explain the term Gaseous exchange as used in biology
Date posted:
April 21, 2018
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Explain the role of the kidney in the purification of blood.
Date posted:
April 20, 2018
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Explain the role of the following in homeostasis;
1. Skin
2. Liver
3. Hypothalamus
Date posted:
April 20, 2018