Potato cylinders were weighed and kept in distilled water overnight. They were then reweighed.

Potato cylinders were weighed and kept in distilled water overnight. They were then reweighed.

(a) Calculate the average mass of the potato cylinders at the end of the experiments.(Show your working).
(b) Explain why the mass of the cylinders had increased.

---

(b) Cells sap is hypertonic to the surrounding water;
Cells absorb water by omosis;increasing in size;

---

sharon kalunda answered the question on September 13, 2019 at 09:18

Exams With Marking Schemes

• Grade 1
• Grade 2
• Grade 3
• Grade 4
• Grade 5
• Grade 6
• Grade 7
• Grade 8
• Grade 9
• PP1
• PP2
• Playgroup
• Form 1
• Form 2
• Form 3
• Form 4

Related Questions

---

• What is the importance of fixation in preparation of temporary slide? (Solved)
  

  What is the importance of fixation in preparation of temporary slide?

  Date posted: September 13, 2019 .    Answers (1)

• Give one structural difference and similarity between a mitochondrion and a chloroplast. (Solved)
  

  Give one structural difference and similarity between a mitochondrion and a chloroplast.

  Date posted: September 13, 2019 .    Answers (1)

• Explain why athletes practicing at high altitude zones have a higher number red blood cells than those at sea level. (Solved)
  

  Explain why athletes practicing at high altitude zones have a higher number red blood cells than those at sea level.

  Date posted: September 13, 2019 .    Answers (1)

• Below is across section of a fruit. (Solved)
  

  Below is across section of a fruit.
  
  (a) Name the type of placentation shown.
  (b) Identify the parts labelled A.

  Date posted: September 13, 2019 .    Answers (1)

• Explain why emulsification is not a chemical digestion. (Solved)
  

  Explain why emulsification is not a chemical digestion.

  Date posted: September 13, 2019 .    Answers (1)

• The diagram below shows a transverse section of a spinal cord. (Solved)
  

  The diagram below shows a transverse section of a spinal cord.
  
  Name the parts labelled A – D.

  Date posted: September 13, 2019 .    Answers (1)

• Name the structure for gaseous exchange in (a) Tadpole (b) Grasshopper (Solved)
  

  Name the structure for gaseous exchange in
  (a) Tadpole
  (b) Grasshopper

  Date posted: September 13, 2019 .    Answers (1)

• The table below shows organisms in a given habitat. (Solved)
  

  The table below shows organisms in a given habitat.
  
  a) Calculate the total number of producers.
  (b) Name the organisms that could be both primary and secondary consumers.
  (c) Name the process through which energy from the sun is incorporated in the ecosystem.
  (d) State why decomposers are not included in the food chain.

  Date posted: September 13, 2019 .    Answers (1)

• Study the diagram below and answer the questions that follow: (a) Identify the above apparatus. (b) State the function of the above apparatus. (c) Name an apparatus... (Solved)
  

  Study the diagram below and answer the questions that follow:
  
  (a) Identify the above apparatus.
  (b) State the function of the above apparatus.
  (c) Name an apparatus that can be used for catching insects on barks of trees or rock surfaces.
  (d) Name the branch of Biology that deals with the study of birds.

  Date posted: September 13, 2019 .    Answers (1)

• Below are photographs labeled B and C of organs obtained from different animals. The organs perform similar functions.Examine them and answer the questions that follow. (Solved)
  

  Below are photographs labeled B and C of organs obtained from different animals. The organs perform similar functions.Examine them and answer the questions that follow.
  
  a) Name the organs B and C.
  b) State the common functions performed by the organs stated above.
  c) Name the parts labeled B₁, B₂ and B₃ in the photograph B.
  d) i) Identify the parts labeled K₁,K₂,and K₃ in photography C
  ii) Using observable features; state how the parts labeled K₁ and K₃ you identified in d (i) above are adapted to their function.

  Date posted: September 13, 2019 .    Answers (1)

• You are provided with a photograph of F and M. Use them to answer the questions that follow (Solved)
  

  You are provided with a photograph of F and M. Use them to answer the questions that follow
  
  a) What type of flower is
  i) F
  ii) M
  b) Name the agents of pollination for each.
  c) State how each of them is adapted for the mode of pollination you have stated in (b) above.
  d) Name parts labeled P,U,X and Y

  Date posted: September 13, 2019 .    Answers (1)

• The diagram below indicates an organism that grows under shaded places with damp conditions. Study it and answer the questions that follow. (Solved)
  

  The diagram below indicates an organism that grows under shaded places with damp conditions. Study it and answer the questions that follow.
  
  a) Name the division to which the specimen belongs.
  b) Name the parts labeled Q, R and S.
  c) State the functions of the parts labeled Q and S
  d) Name the two body forms of the organism in its alteration of generations.

  Date posted: September 13, 2019 .    Answers (1)

• The figure below shows blood of a person that was obtained after a test. a) What condition is the person suffering from? b) Why would such... (Solved)
  

  The figure below shows blood of a person that was obtained after a test.
  
  a) What condition is the person suffering from?
  b) Why would such a person survive better in malaria prone areas than a normal person?
  c) What is the disadvantage of acquiring such a condition?

  Date posted: September 13, 2019 .    Answers (1)

• Name two kingdoms whose members reproduce by means of spores. (Solved)
  

  Name two kingdoms whose members reproduce by means of spores.

  Date posted: September 13, 2019 .    Answers (1)

• The graph below represents growth of bacteria when cultured in a suitable media. (Solved)
  

  The graph below represents growth of bacteria when cultured in a suitable media.
  
  a) Name phases labeled A and C.
  b) Account for the growth of the organism in phase (a)

  Date posted: September 13, 2019 .    Answers (1)

• The diagram below shows a structure in flowering plants.State the function of each of the following parts labeled A and B after double fertilization. (Solved)
  

  The diagram below shows a structure in flowering plants.State the function of each of the following parts labeled A and B after double fertilization.
  

  Date posted: September 13, 2019 .    Answers (1)

• The wings of a bird and those of a housefly adapt the two organisms to a boreal habitat. i) Give the evolutionary process that may have... (Solved)
  

  The wings of a bird and those of a housefly adapt the two organisms to a boreal habitat.
  i) Give the evolutionary process that may have given rise to these structures.
  ii) What name is given to such structures?

  Date posted: September 13, 2019 .    Answers (1)

• State the fluids that provide cushion in the following organs (Solved)
  

  State the fluids that provide cushion in the following organs
  (a) Lungs
  (b) Heart
  (c) Knee
  (d) Eye ball

  Date posted: September 11, 2019 .    Answers (1)

• The diagram below illustrates a physiological process that occurs in the alimentary canal of man. (Solved)
  

  The diagram below illustrates a physiological process that occurs in the alimentary canal of man.
  
  a) Name the process Q above
  b) Explain the biological importance of the above process.
  c) Name the substance that helps the process named (a) above.

  Date posted: September 11, 2019 .    Answers (1)

• The diagram below represents a mammalian bone. a) State the function of the part labeled K and L b) State the region of the body in... (Solved)
  

  The diagram below represents a mammalian bone.
  
  a) State the function of the part labeled K and L
  b) State the region of the body in which the above bone is found.

  Date posted: September 11, 2019 .    Answers (1)