Most plants have a thin layer of waxy cuticle to minimize water loss through the plant surface.
Most plants have reduced size of leaves to reduce surface area exposed to the environment.
Some plants have spiky leaves that totally lose no water.
Some plants shed leaves at certain intervals to preserve the little water contained in the plants.
Most plants have deep roots to suck water deep inside the ground.
Some plants have widely spread shallow roots to maximize absorption of any water on surface from rain.
Most leaves have deep and few stomata reducing the average water lost.
Some plants curl leaves during daytime to avoid the effect of heat.
Andreaz answered the question on November 28, 2017 at 04:03
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The graph below shows daily variation of human body temperature over three days
(Solved)
The graph below shows daily variation of human body temperature over three days
(i)What is the maximum range of body temperature under normal conditions as shown in the graph?
(ii)At what time each day does body temperature drop to its lowest level?
(iii)Suggest a reason for the drop in temperature at the time referred to in (ii) above
(iv)Children typically have higher temperature than adults.Suggest a reason for this
(v)What is the advantage of the higher body temperature in children?
Date posted:
November 21, 2017
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Answers (1)
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Which waste product is almost absent in the renal vein but present in the renal artery?
(Solved)
Which waste product is almost absent in the renal vein but present in the renal artery?
Date posted:
November 20, 2017
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Answers (1)
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The diagram shows microscopic detail from a human lung
(Solved)
The diagram shows microscopic detail from a human lung
(i)Name the part labelled A,B and C
(ii)Give two features of the structures in the diagram that allow for efficient gas exchange
(iii)Which gas,dissolved in the blood,can trigger deeper or faster breathinggf
Date posted:
November 20, 2017
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Answers (1)
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The diagram below shows the internal structure of a leaf
(Solved)
The diagram below shows the internal structure of a leaf
(i)Name the one tissue type that is found at both W and X
(b)The cell at W contains many organelles that carry out photosynthesis.
Suggest why the cells at W contain more of these organelles than the cells at cells at X
(c)In layer X,gases can diffuse throughout the leaf.Name one such gas
(d)State one function of the opening at Z
Date posted:
November 20, 2017
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Answers (1)
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The diagram below shows a section through human skin
(Solved)
The diagram below shows a section through human skin
(i)Name the parts labelled A,B and C
(ii)The skin is one of the excretory organs in humans
name one substance excreted by the skin
(iii)List two other functions of the skin
Date posted:
November 20, 2017
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Answers (1)
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Amoeba is a tiny ,one-celled organism.This diagram below shows the structure of a fresh water Amoeba as seen through a light microscope
(Solved)
Amoeba is a tiny ,one-celled organism.This diagram below shows the structure of a fresh water Amoeba as seen through a light microscope
(a)Name parts labelled A,C and D on the diagram
(b)state:-One function of part A
-One function of part C
Date posted:
November 20, 2017
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Answers (1)
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State the theories explaining the origin of HIV/AIDS
(Solved)
State the theories explaining the origin of HIV/AIDS
Date posted:
November 18, 2017
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Answers (1)
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Give two reasons why lipids are not suitable respiratory substrates
(Solved)
Give two reasons why lipids are not suitable respiratory substrates
Date posted:
November 17, 2017
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Answers (1)
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A strip of a herbaceous Tradescantia was cut longitudinally as shown below and placed in solution X.After one hour,the strips appeared as shown below.
(Solved)
A strip of a herbaceous Tradescantia was cut longitudinally as shown below and placed in solution X.After one hour,the strips appeared as shown below.
(a)What was the nature of solution X?
(b)What physiological process was being investigated?
(b)Account for the results at the end of experiment after one hour
Date posted:
November 16, 2017
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Answers (1)
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The diagram below shows how gaseous exchange occurs across the gill in fish
(Solved)
The diagram below shows how gaseous exchange occurs across the gill in fish
(i)What is the term used to describe this type of flow displayed above?
(ii)What is the advantage of this flow system
(iii)Name an organ in human beings that displays this flow system
Date posted:
November 16, 2017
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Answers (1)
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State two adaptations of the nephron of a desert animal.
(Solved)
State two adaptations of the nephron of a desert animal.
Date posted:
November 16, 2017
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Answers (1)
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Explain why amoeba does not require transport system.
(Solved)
Explain why amoeba does not require transport system.
Date posted:
November 16, 2017
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Answers (1)
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Describe what happens during the dark stage of photosynthesis.
(Solved)
Describe what happens during the dark stage of photosynthesis.
Date posted:
November 15, 2017
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Answers (1)
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Why is it necessary to use a sharp razor blade while preparing sections to be viewed under a light microscope?
(Solved)
Why is it necessary to use a sharp razor blade while preparing sections to be viewed under a light microscope?
Date posted:
November 15, 2017
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Answers (1)
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The lungs and ileum are adapted for absorption. State three features they have in common which facilitate absorption.
(Solved)
The lungs and ileum are adapted for absorption. State three features they have in common which facilitate absorption.
Date posted:
November 15, 2017
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Answers (1)
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Two equal strips A and B were from a potato whose cell was 30% of sugar. The strip A was placed in a solution of...
(Solved)
Two equal strips A and B were from a potato whose cell was 30% of sugar. The strip A was placed in a solution of 10% sugar concentration while strip B was placed in 50% sugar concentration. a) What change was expected in strips A and B?
Date posted:
November 15, 2017
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Answers (1)
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Explain why amoeba does not have a specialized structure for gaseous exchange.
(Solved)
Explain why amoeba does not have a specialized structure for gaseous exchange.
Date posted:
November 14, 2017
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Answers (1)
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Name two digestive enzymes that work best at acidic conditions in human body.
(Solved)
Name two digestive enzymes that work best at acidic conditions in human body.
Date posted:
November 12, 2017
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Answers (1)
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State the excretory products of plants and some of their economic importances
(Solved)
State the excretory products of plants and some of their economic importances.
Date posted:
November 10, 2017
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Answers (1)
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Name one cell organelle found in the actively respiring tissues
(Solved)
Name one cell organelle found in the actively respiring tissues
Date posted:
November 8, 2017
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Answers (1)