gaseous exchange in mammals starts from the nose, air is cleaned, purified in the nostrils i.e. moisture and dust particles are removed. purified air I is passed through the trachea to the bronchus, bronchuoles (sub -bronchus) and enters the air sacs in the lungs where gaseous exchange takes place (alveous). oxygen is absorbed into the moist walls of the alveous and carbon iv oxide is removed and brought out through the same process to nose and breath out.
BORORIO answered the question on May 4, 2018 at 03:50
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Highlight the basic procedures that are followed in binomial nomenclature
(Solved)
Highlight the basic procedures that are followed in binomial nomenclature.
Date posted:
May 1, 2018
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Answers (1)
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State what would happen in each of the following:
(a)if a plant cell is kept in;
(i)strong salt solution
...
(Solved)
State what would happen in each of the following:
(a)if a plant cell is kept in;
(i)strong salt solution
(i)distilled water
(b)if a red blood cell is kept in;
(i)distilled water
(ii)concentrated salt solution
Date posted:
April 30, 2018
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Answers (1)
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What happens when the arrector pili muscles of the skin contract?
(Solved)
What happens when the arrector pili muscles of the skin contract?
Date posted:
April 30, 2018
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Answers (1)
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Discuss the adaptations of the following plants to their various habitats (i) Xerophytes (ii) Mesophytes (iii)Halophytes (iv) Hydrophytes
(Solved)
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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Answers (1)
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Describe the evidences of organic evolution
(Solved)
Describe the evidences of organice evolution.
Date posted:
April 30, 2018
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Answers (1)
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What makes diseases caused by viruses and bacteria hard to treat?
(Solved)
What makes diseases caused by viruses and bacteria hard to treat?
Date posted:
April 29, 2018
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Answers (1)
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How are leaves of mesophytes adapted to their functions?
(Solved)
How are leaves of mesophytes adapted to their functions?
Date posted:
April 28, 2018
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Answers (1)
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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?
(Solved)
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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Answers (1)
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Explain how saliva is important in digestion.
(Solved)
Explain how saliva is important in digestion.
Date posted:
April 28, 2018
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Answers (1)
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Name one main cause of global warming.
(Solved)
Name one main cause of global warming.
Date posted:
April 28, 2018
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Answers (1)
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What is the importance of saprophytic fungi and bacteria in an ecosystem?
(Solved)
What is the importance of saprophytic fungi and bacteria in an ecosystem?
Date posted:
April 28, 2018
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Answers (1)
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Describe how the belt transect can be used in estimating the population of a shrub in a grass land.
(Solved)
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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Answers (1)
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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...
(Solved)
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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Answers (1)
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State two most important factors that favour exponential growth of a population of gazelle in a park.
(Solved)
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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Answers (1)
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Using relevant examples explain the meaning of the following terms: (i) Adaptive radiation (ii) Convergent evolution (ii)Mutation
(Solved)
(i) Adaptive radiation
(ii) Convergent evolution
(iii) Mutation
Date posted:
April 28, 2018
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Answers (1)
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Name two organelles in plants that can be seen under low power objective lens
(Solved)
Name two organelles in plants that can be seen under low power objective lens
Date posted:
April 27, 2018
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Answers (1)
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Describe the pumping mechanism of the heart
(Solved)
Describe the pumping mechanism of the heart
Date posted:
April 25, 2018
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Answers (1)
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Discuss five factors influencing photosynthesis.
(Solved)
Discuss five factors influencing photosynthesis.
Date posted:
April 25, 2018
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Answers (1)
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Describe how natural selection brings about adaptations of a species to its environment
(Solved)
Describe how natural selection brings about adaptations of a species to its environment.
Date posted:
April 25, 2018
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Answers (1)
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Explain why the companion cells are located next to the sieve tubes
(Solved)
Explain why the companion cells are located next to the sieve tubes.
Date posted:
April 24, 2018
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Answers (1)