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movement of substances from one part of cell membrane to another;
sharon kalunda answered the question on May 27, 2019 at 13:25
- The diagram below shows the structure of a monocotyledonous seed
(a) Name the parts B and D
(b) Name the parts that would stain blue black...(Solved)
The diagram below shows the structure of a monocotyledonous seed
(a) Name the parts B and D
(b) Name the parts that would stain blue black with iodine solution.
Date posted: May 27, 2019. Answers (1)
- Name the type of reproduction in the following organisms.
(a) Yeast
(b) Bacteria
(c) Rhizopus(Solved)
Name the type of reproduction in the following organisms.
(a) Yeast
(b) Bacteria
(c) Rhizopus
Date posted: May 27, 2019. Answers (1)
- Define the following terms in reference to fish locomotion
(a) Pitching
(b) Rolling
(c) Yawing(Solved)
Define the following terms in reference to fish locomotion
(a) Pitching
(b) Rolling
(c) Yawing
Date posted: May 27, 2019. Answers (1)
- Name a disadvantageous gene that is dominant(Solved)
Name a disadvantageous gene that is dominant
Date posted: May 27, 2019. Answers (1)
- State three functions of adrenaline released when a person is faced with an emergency situation.(Solved)
State three functions of adrenaline released when a person is faced with an emergency situation.
Date posted: May 27, 2019. Answers (1)
- The table below shows percentage water gain in man and kangaroo rat.
Explain why a Kangaroo rat gains a higher percentage of metabolic water than human...(Solved)
The table below shows percentage water gain in man and kangaroo rat.
Explain why a Kangaroo rat gains a higher percentage of metabolic water than human beings.
Date posted: May 27, 2019. Answers (1)
- State the functions of the following in the heart.
(a) Sino Atrio Node (SAN)
(b) Interventricular septum(Solved)
State the functions of the following in the heart.
(a) Sino Atrio Node (SAN)
(b) Interventricular septum
Date posted: May 27, 2019. Answers (1)
- Name the basic functional unit of a kidney.(Solved)
Name the basic functional unit of a kidney.
Date posted: May 27, 2019. Answers (1)
- The figure below shows feet of various birds. Study the diagram and answer the questions that follow.
(i) Name the type of evolution represented by the...(Solved)
The figure below shows feet of various birds. Study the diagram and answer the questions that follow.
(i) Name the type of evolution represented by the diagrams.
(ii) Using Darwin’s theory of evolution, explain how the feet of bird E would have evolved.
(iii) Explain how Larmack could have explained the evolution of feet of bird C.
Date posted: May 27, 2019. Answers (1)
- How are respiratory gases, oxygen and carbon (IV) oxide transported to and from tissues in mammals?(Solved)
How are respiratory gases, oxygen and carbon (IV) oxide transported to and from tissues in mammals?
Date posted: May 27, 2019. Answers (1)
- Name the process in the human body that ensures that haemolysis of red blood cells is prevented.(Solved)
Name the process in the human body that ensures that haemolysis of red blood cells is prevented.
Date posted: May 27, 2019. Answers (1)
- What term is used to describe the solution with equal solute concentration as that of the cells?(Solved)
What term is used to describe the solution with equal solute concentration as that of the cells?
Date posted: May 27, 2019. Answers (1)
- An experiment was carried out in which red blood cells were put in salt solutions of different concentrations. The table below shows the percentage of...(Solved)
An experiment was carried out in which red blood cells were put in salt solutions of different concentrations. The table below shows the percentage of cells which were destroyed by haemolysis in different salt concentration.
(a) Draw a graph of percentage of red blood cells haemolysed against salt concentration.
(b) Explain haemolysis of red blood cells.
(c) From the graph, state:
(i) the salt concentration at which 50% red blood cells were haemolysed.
(ii) the highest salt concentration when the largest number of red blood cells were haemolysed.
(d) (i) Suggest the normal salt concentration in the blood of the mammal from which the red blood cells were obtained.
(ii) Give a reason for your answer in (d) (i) above.
Date posted: May 27, 2019. Answers (1)
- A pea plant with smooth seeds was crossed with one with wrinkled seeds. The gene for smooth seeds is dorminant over that for wrinkled seeds....(Solved)
A pea plant with smooth seeds was crossed with one with wrinkled seeds. The gene for smooth seeds is dorminant over that for wrinkled seeds. Use letter R to represent the dorminant.
(a) State the genotype of the parents if the plant with smooth seeds was heterozygous.
(b) State the gametes produced by the smooth seeds and wrinkled seeds parents.
(c) State the genotype and phenotype of F1 generation. Show your working.
Date posted: May 27, 2019. Answers (1)
- The table below shows the number of Leopards and Impala in a grassland park over a period of six years.
(a) (i) What is the average...(Solved)
The table below shows the number of Leopards and Impala in a grassland park over a period of six years.
(a) (i) What is the average number of Impala in the park during the six years.
(ii) Account for the decrease in the number of leopards between the 4th and 6th year?
(b) Identify the trophic level occupied by
(i) Leopards
(ii) Tick feeding on the leopard.
(c) The two pyramids shown were obtained in the park.
Identify each type of pyramid.
Date posted: May 27, 2019. Answers (1)
- Study the diagram shown below of the anterior view of a lumbar vertebra of a mammal.
(a) Name the parts labelled: A,B,C
(b) State the function...(Solved)
Study the diagram shown below of the anterior view of a lumbar vertebra of a mammal.
(a) Name the parts labelled: A,B,C
(b) State the function of the part labelled D.
(c) State three roles of skeletons in organisms.
(d) State how the part labelled D in adapted for the function stated in (b) above.
Date posted: May 27, 2019. Answers (1)
- The graph below shows rates of photosynthesis in a plant at different temperatures.
(a) Account for the decrease in the rate of product formation at 410C...(Solved)
The graph below shows rates of photosynthesis in a plant at different temperatures.
(a) Account for the decrease in the rate of product formation at 410C from 5 to 20 minutes.
(b) Explain the results obtained at
(i) 250C.
(ii) 360C.
(c) (i) Other than temperature, state one external factor that affect the rate of photosynthesis.
(ii) Suggest the product which could have been used in the experiment.
Date posted: May 27, 2019. Answers (1)
- The diagram below shows a model of the nephron of a mammalian kidney.
(a) Which parts of the nephron are represented by the:
(i) Syringe?
(ii) Perforated rubber...(Solved)
The diagram below shows a model of the nephron of a mammalian kidney.
(a) Which parts of the nephron are represented by the:
(i) Syringe?
(ii) Perforated rubber tubing?
(iii) Free rubber tubing?
(b) Name the type of filtration taking place within the perforated rubber tubing.
(c) What would happen to the contents of the syringe if its handle was slowly pushed forward? Explain.
Date posted: May 27, 2019. Answers (1)
- Use the photographs provided to answer the questions that follow:
a) (i) Identify the type of cell division represented in the photographs A and B.
(ii)...(Solved)
Use the photographs provided to answer the questions that follow:
a) (i) Identify the type of cell division represented in the photographs A and B.
(ii) With a reason, name the stage of cell division represented in each case.
(iii) Name the parts of human body where the process B represented above occur.
b) (i) What type of fruit is represented by photograph I? Give two reasons.
(ii) Name the agent of dispersal for fruits II and III.
(iii) How are the fruits adapted for the mode of dispersal stated in (b) ( ii) above?
(iv) Identify the type of placentation shown by photograph I.
Date posted: May 27, 2019. Answers (1)
- Below are pictures from two different organisms.
(i) What is the specific function of the two structures shown in the pictures?
(ii) What type of structures...(Solved)
Below are pictures from two different organisms.
(i) What is the specific function of the two structures shown in the pictures?
(ii) What type of structures is represented by the two structures shown on the pictures?
Date posted: May 27, 2019. Answers (1)