a)Gradual change in organism from simple to complex life form over long period of time.
b)Industrial areas have dark sooty tree trunks, in rural areas the trunks are covered with lichens. The dark melanin forms camouflage on the dark tree trunk. The white were predated upon the dark survive to reproductive maturity and produced more moths
c)Convergent-the organism has different embryonic origin yet modified to exploit the same habitat. While divergent evolution organism claim the same embryonic origin yet modified to exploit different ecological niche
Githiari answered the question on September 13, 2017 at 20:05
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Define the term: (i)Greenhouse effect (ii)Global warming
(Solved)
Define the term:
i)Greenhouse effect
ii)Global warming
Date posted:
September 13, 2017
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Answers (1)
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(a) Give the importance of nitrogen cycle in the atmosphere
(Solved)
(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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Answers (1)
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What is the difference in the roots of Monocotyledonae and Dicotyledonae?
(Solved)
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
(Solved)
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
(Solved)
State the economic importance of the following excretory products in plants
i)Nicotine
ii)Quinine
Date posted:
September 13, 2017
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Answers (1)
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Name the causative agent of whooping cough
(Solved)
Name the causative agent of whooping cough
Date posted:
September 13, 2017
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Answers (1)
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(a) What is anaphylaxis (b)Give the difference between artificial active acquired and natural active acquired immunity (c) State how...
(Solved)
(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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Answers (1)
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How is a palisade mesophyll suited to carry out photosynthesis?
(Solved)
How is a palisade mesophyll suited to carry out photosynthesis?
Date posted:
September 13, 2017
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Answers (1)
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a) Distinguish between Plasmolysis and turgidity
(Solved)
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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Answers (1)
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(a)State two functions of the plasma membrane?
(Solved)
(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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Answers (1)
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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?...
(Solved)
(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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Answers (1)
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In what two ways does excretion differ between plants and animals?
(Solved)
In what two ways does excretion differ between plants and animals?
Date posted:
September 13, 2017
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Answers (1)
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Define facultative anaerobes as used in respiration
(Solved)
Define facultative anaerobes as used in respiration.
Date posted:
September 13, 2017
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Answers (1)
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Why is dropping of leaves important to plants on a hot sunny afternoon?
(Solved)
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
(Solved)
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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Answers (1)
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Name three types of nerve cells found in the nervous system of vertebrates
(Solved)
Name three types of nerve cells found in the nervous system of vertebrates
Date posted:
September 13, 2017
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Answers (1)
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Peter stayed with his parents in Malindi for eight years. His blood count was about 4.5 million per one milliliter of blood. They migrated to...
(Solved)
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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Answers (1)
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Outline two advantages of polyploidy to a farmer
(Solved)
Outline two advantages of polyploidy to a farmer
Date posted:
September 13, 2017
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Answers (1)
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Explain the importance of keeping bees in an orchard (garden of fruits)
(Solved)
Explain the importance of keeping bees in an orchard (garden of fruits)
Date posted:
September 13, 2017
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Answers (1)
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Explain how each of the following processes causes variation (i) Meiosis (ii) Fertilization
(Solved)
Explain how each of the following processes causes variation (i) Meiosis (ii) Fertilization
Date posted:
September 13, 2017
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Answers (1)