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a. What is a hand lens?
b. How is a hand lens used?
c. When is a hand lens used?
Date posted:
September 15, 2017
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State the characteristics of living organisms.
Date posted:
September 15, 2017
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Explain the importance of biology.
Date posted:
September 15, 2017
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List the branches of biology.
Date posted:
September 15, 2017
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Define Biology.
Date posted:
September 15, 2017
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Describe how herbaceous plants obtain their support?
Date posted:
September 13, 2017
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How are female parts of wind pollinated flowers adapted to perform their function?
Date posted:
September 13, 2017
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(a) Define nondisjunction?
(b) Name two genetic disorders of the blood.
Date posted:
September 13, 2017
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Give three effects of over secretion of adrenaline?
Date posted:
September 13, 2017
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What are the roles of each of the following on transmission of impulses:
i)Nodes of Ranvier
ii)Myelin Sheath
Date posted:
September 13, 2017
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State the three structural adaptations of the lungs in mammals
Date posted:
September 13, 2017
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(a)What is organic evolution
(b)Briefly explain how the peppered moth (Biston betularia) shows natural selection
(c)Distinguish between convergent and divergent evolution
Date posted:
September 13, 2017
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Define the term:
i)Greenhouse effect
ii)Global warming
Date posted:
September 13, 2017
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(a) Give the importance of nitrogen cycle in the atmosphere
(b)What are the roles of the following organisms in an ecosystem?
i)Decomposers
ii)Detrivores
Date posted:
September 13, 2017
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What is the difference in the roots of Monocotyledonae and Dicotyledonae?
Date posted:
September 13, 2017
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Give three distinguishing features of class Aves
Date posted:
September 13, 2017
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State the economic importance of the following excretory products in plants
i)Nicotine
ii)Quinine
Date posted:
September 13, 2017
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Name the causative agent of whooping cough
Date posted:
September 13, 2017
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(a) What is anaphylaxis
(b)Give the difference between artificial active acquired and natural active acquired immunity
(c) State how the following structural features affect transpiration
i)Leaf fall
ii)Sunken stomata
iii)Thin cuticle
Date posted:
September 13, 2017
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How is a palisade mesophyll suited to carry out photosynthesis?
Date posted:
September 13, 2017
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a) Distinguish between Plasmolysis and turgidity
(b) Explain how the following factors affect active transport
i)Oxygen concentration
ii)Metabolic poisons
Date posted:
September 13, 2017
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(a)State two functions of the plasma membrane?
(b) Give the synthetic role of smooth endoplasmic reticulum
Date posted:
September 13, 2017
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(a)Give two contribution made by Carolus Linnaeus to classification
(b) Classify a Human being base on the Order and Family it belong
Date posted:
September 13, 2017
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In what two ways does excretion differ between plants and animals?
Date posted:
September 13, 2017
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Define facultative anaerobes as used in respiration.
Date posted:
September 13, 2017
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Why is dropping of leaves important to plants on a hot sunny afternoon?
Date posted:
September 13, 2017
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The equation below represents a metabolic reaction that occurs in the mammalian liver
Amino acids ------->Organic compounds + urea
(a) Name the process
(b) What is the course of amino acids in the process?
(c) What is the difference between essential and non-essential amino acids?
Date posted:
September 13, 2017
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Name three types of nerve cells found in the nervous system of vertebrates
Date posted:
September 13, 2017
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Peter stayed with his parents in Malindi for eight years. His red blood cell count was about 4.5 million per one milliliter of blood. They migrated to Kisii town and after one year his red blood cell count was approximately 6.2 million per one milliliter of blood. Explain reason for rise in the number of red blood cells.
Date posted:
September 13, 2017
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Outline two advantages of polyploidy to a farmer
Date posted:
September 13, 2017