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i) C: cardiac muscles / heart muscles
D: Smooth muscles / visceral muscles;
ii)
B ........................................D
Has one nucleus .................................................Has many nuclei
Nucleus located at the center of muscle fibre .............Nucleus located at the periphery of the fibre
Cells are spindle........................................... shaped Cells are cylindrical
Lack striations............................................. Has striations
iii) B - cause locomotion upon contraction;
C – causes heartbeat to pump blood upon contraction;
iv) C has neuromuscular cells /myogenic to initiate and maintain contraction;
· Has intercalated discs to spread waves of contraction;
· Does not undergo fatigue to contract throughout life of animal;
· Has many mitochondria to produce more energy for contraction;
sharon kalunda answered the question on September 18, 2019 at 07:36
- Photographs B, C and D below represent support structures in plants. Use them to answer the questions that follow.(Solved)
Photographs B, C and D below represent support structures in plants. Use them to answer the questions that follow.
(i) Name the support structure represented by photograph B
(ii) Explain briefly how the coiling in photograph B occurs
(iii) Name the structures labeled L on photograph C.
iv). Photograph D is a magnified photomicrograph of support tissues found in part x of photograph C. Give the name of the tissue labeled t.
(vi) Describe the structure of the cells of the tissue named in (a) (iv) above
Date posted: September 18, 2019. Answers (1)
- a)Name the excretory product produced in the liver and used in the intestine.
(b) State two functions of the waste product named in (a) above.(Solved)
a)Name the excretory product produced in the liver and used in the intestine.
(b) State two functions of the waste product named in (a) above.
Date posted: September 18, 2019. Answers (1)
- The diagram below represents a food web from lake Nakuru National Park.(Solved)
The diagram below represents a food web from lake Nakuru National Park.
a) i) Identify the organism with the largest biomass.
ii) Give a reason for your answer in a (i) above.
b) From the food web, isolate a food chain ending with snakes as tertiary consumers.
c) i) Name any two organisms not shown in the food web but would be present in the ecosystem.
ii) What is the role of the organisms stated in c (i) above?
d) From the food web, snakes and leopards feed on rabbits. What name is given to this kind of competition?
e) From the food web, name an organism that may be both a secondary and a tertiary consumer.
Date posted: September 18, 2019. Answers (1)
- A cross between a red forward and white flowered plant produce plants with flowers having red and white patches.(Solved)
A cross between a red forward and white flowered plant produce plants with flowers having red and white patches.
a) What phenomenon is represented by this condition?
b) Work out a cross between the F1 plants.
c) State the phenotypic ratio of F2 plants.
d) State the genotypic ratio of F2 plants.
Date posted: September 18, 2019. Answers (1)
- A blood group A mother gave birth to a blood group O child with a blood group B husband.(Solved)
A blood group A mother gave birth to a blood group O child with a blood group B husband.
a) State the genotypes of the parents.
b) What was the genotype of the child?
c) State other blood groups likely to occur in the children of the couple.
Date posted: September 18, 2019. Answers (1)
- Name three classes in animals that excrete nitrogenous water in form of uric acid.(Solved)
Name three classes in animals that excrete nitrogenous water in form of uric acid.
Date posted: September 18, 2019. Answers (1)
- Study the diagram below.(Solved)
Study the diagram below.
a) Name the parts A, B and C.
b) Name the division to which the organism belong.
c) State two roles of the structure labelled D.
Date posted: September 18, 2019. Answers (1)
- Name the photoreceptor cells in retina that respond to
(i) Dim light
(ii) Bright light(Solved)
Name the photoreceptor cells in retina that respond to
(i) Dim light
(ii) Bright light
Date posted: September 18, 2019. Answers (1)
- The figure below illustrate specialised cells in an animal.(Solved)
The figure below illustrate specialised cells in an animal.
a) Identify the cells.
b) Name three organs systems where the cells named in (a) above are found.
Date posted: September 18, 2019. Answers (1)
- In an experiment two equal volumes of solution L and M were placed into visking tubing. The visking tubing was suspended into beakers containing equal...(Solved)
In an experiment two equal volumes of solution L and M were placed into visking tubing. The visking tubing was suspended into beakers containing equal volumes of solutions K. The set –up is as shown in the diagram A and B. The set-up was allowed to stand for 45 minutes and results are as shown in the diagrams.
(a) Name the process that was being demonstrated.
(b) Explain the results that were obtained at the end of the experiment in
(i) Set-up A.
(ii) Set up B.
Date posted: September 18, 2019. Answers (1)
- Name two regions in human body that displays counter-current flow system.(Solved)
Name two regions in human body that displays counter-current flow system.
Date posted: September 17, 2019. Answers (1)
- State the type of placentation found in the following fruits.
i) Pawpaw
ii) Orange
iii) Bean pod(Solved)
State the type of placentation found in the following fruits.
i) Pawpaw
ii) Orange
iii) Bean pod
Date posted: September 17, 2019. Answers (1)
- Study the diagram below and answer question that follow.(Solved)
Study the diagram below and answer question that follow.
i) Epithelial layer above is located in the nasal cavity.
Name the structure labeled A and B
ii) State the significance of the structure A.
Date posted: September 17, 2019. Answers (1)
- Diagram below represents a type of muscle.(Solved)
Diagram below represents a type of muscle.
a) Identify the type of muscle shown above.
b) Name two parts of human body where this type of muscle can be found.
Date posted: September 17, 2019. Answers (1)
- Study the diagram below and answer question that follow.(Solved)
Study the diagram below and answer question that follow
a) Identify the structures shown in figure above.
b) Identify
i) Part B
ii) Part C
iii) Gas X
Date posted: September 17, 2019. Answers (1)
- After an ecological study of feeding relationship students constructed the food web below.(Solved)
After an ecological study of feeding relationship students constructed the food web below.
a) Name the process through which energy from the sun is incorporated into the food web.
b) State the mode of feeding of the birds in the food web.
c) Name two ecosystems in which the organisms in the food web live.
d) From the information in the food web, construct a food chain with the large bird as a quaternary consumer.
e) What would happen to the organism in the food web if bird N migrated?
f) Not all the energy from one trophic level is available to the next level. Explain.
g) i) Two organisms which play a role in the ecosystem are not included in the food web. Name them.
ii) State the role played by the organisms named in g (i) above.
h) i) State three human activities that would affect the ecosystems.
Date posted: September 17, 2019. Answers (1)
- The figure below shows the changes in blood level of hormones that takes during the menstrual cycle in a human female.(Solved)
The figure below shows the changes in blood level of hormones that takes during the menstrual cycle in a human female.
a) Name the hormones whose concentration arte represented by curves X and Y.
b) State two effects of the hormone X during the menstrual cycle.
c) Explain the role of FSH in female reproduction.
d) What is the role of a high concentration of luteinizing hormone?
e) State the fertile period during the menstrual cycle.
Date posted: September 17, 2019. Answers (1)
- The diagram shows a set up to investigate anaerobic respiration in germinating bean seed.(Solved)
The diagram shows a set up to investigate anaerobic respiration in germinating bean seed.
a) What is the purpose of the pyrogallic acid?
b) State the importance of the water bath in the experiment.
c) Write a word equation for anaerobic respiration taking place in the germinating beans.
d) Explain why plants can only respire anaerobically for a short period of time.
e) What would be product if the process was taking place in animal muscle?
f) Distinguish between obligate and facultative Anaerobes.
g) Name the site for anaerobic respiration in a cell.
Date posted: September 17, 2019. Answers (1)
- Leaves are the organs of photosynthesis. The following diagram shows what happens in a plant leaf during photosynthesis.(Solved)
Leaves are the organs of photosynthesis. The following diagram shows what happens in a plant leaf during photosynthesis.
a) Give two ways in which leaves are adapted to absorb light.
b) Name the gases labeled X and Y
c) Explain why it is an advantage for plant to store carbohydrates in form of starch rather than as sugar.
d) Describe what happens during dark stage of photosynthesis.
Date posted: September 17, 2019. Answers (1)
- The figure below represents a reproductive organ of a plant.(Solved)
The figure below represents a reproductive organ of a plant.
a) Which letter represents the structure that produces female gametes ?
b) Name the structure labelled W.
c) Which letter represents the structure where fertilization takes place ?
d) Which letter represents the structure where male gametes are produced ?
Date posted: September 17, 2019. Answers (1)