a) Long sightedness/ hypermetropia ;
b) Convex/ converging lenses;
marto answered the question on October 7, 2019 at 08:53
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An experiment was carried out to investigate the rate of growth of pollen tube against time.
The results are shown in the table below.
(Solved)
An experiment was carried out to investigate the rate of growth of pollen tube against time.
The results are shown in the table below.
(b) (i) At what intervals was the growth of the pollen tube measured?
(ii) What was the length of pollen tube at; 130 minutes
(iii) At what time was the length of the pollen tube 18mm?
(iv) With reasons, describe the growth pattern of the pollen tube between:
- 0 to 120minutes
- Reason
- 120 to 180 minutes
- Reason
v) State the importance of the growth of pollen tube to the plant
(c) State the changes that take place in a flower after fertilization
Date posted:
October 7, 2019
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Answers (1)
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The diagram below represents female reproductive system.
(Solved)
The diagram below represents female reproductive system.
a) Name the part labeled; A, B, C and D
b) State two functions of structure A
c) How is part C adapted to its function?
d) Of what significance is part E to reproduction?
Date posted:
October 7, 2019
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Answers (1)
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Why is immunization against diseases encouraged by the government?
(Solved)
Why is immunization against diseases encouraged by the government?
Date posted:
October 7, 2019
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Answers (1)
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What do you understand by the word Acquired Immunity Deficiency Syndrome (AIDS)?
(Solved)
What do you understand by the word Acquired Immunity Deficiency Syndrome (AIDS)?
Date posted:
October 7, 2019
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Answers (1)
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State two ways by which the HIV spread may be controlled through patients in hospitals.
(Solved)
State two ways by which the HIV spread may be controlled through patients in hospitals.
Date posted:
October 7, 2019
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Answers (1)
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The diagram below represents some hormones, their sources and functions in mammals.
(Solved)
The diagram below represents some hormones, their sources and functions in mammals.
a) Name the hormones I, II and III
b) Name hormones IV and state its function
c) Name the control labelled A & B
d) Name one secondary sexual characteristic common to both males and females
Date posted:
October 7, 2019
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Answers (1)
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The diagrams below represent two gynoecia A and B obtained from two different plants.
(Solved)
The diagrams below represent two gynoecia A and B obtained from two different plants.
(a) What name is given to;
Gynoecium A?
Gynoecium B?
(b) State the observable difference between the gnoecia A and B
(c) State the role played by Heterostyly in plants.
Date posted:
October 7, 2019
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Answers (1)
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The diagram below shows a stage during cell division.
(Solved)
The diagram below shows a stage during cell division.
(i) Name the stage of cell division
(ii) Give a reason for your answer
(b) Name two structures in plants where male and female gametes are produced
Date posted:
October 7, 2019
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Answers (1)
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Describe the possible effects of discharging hot effluent from a factory into a slow flowing river.
(Solved)
Describe the possible effects of discharging hot effluent from a factory into a slow flowing river.
Date posted:
October 7, 2019
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Answers (1)
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What is the main product of the dark stage of photosynthesis?
(Solved)
What is the main product of the dark stage of photosynthesis?
Date posted:
October 7, 2019
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Answers (1)
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State the role of centrioles during cell division.
(Solved)
State the role of centrioles during cell division.
Date posted:
October 7, 2019
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Answers (1)
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The diagram below illustrate a process in a given species of organism.
(Solved)
The diagram below illustrate a process in a given species of organism.
a) Name the organism that undergoes the process above.
b) Identify the process shown to be taking place.
Date posted:
October 7, 2019
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Answers (1)
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The diagram below shows a pollen – tube entering the ovule of a flowering plant.
(Solved)
The diagram below shows a pollen – tube entering the ovule of a flowering plant.
a) Name the parts labeled A, B and D
b) Name the kind of fertilization exhibited by the above flowering plant.
Date posted:
October 7, 2019
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Answers (1)
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State three ways in which flowers parent self pollination.
(Solved)
State three ways in which flowers parent self pollination.
Date posted:
October 7, 2019
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Answers (1)
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Name the hormone that Stimulates the disintegration of the corpus inteum when fertilization fails to take place.
(Solved)
Name the hormone that Stimulates the disintegration of the corpus inteum when fertilization fails to take place.
Date posted:
October 7, 2019
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Answers (1)
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Name two mechanisms that hinder self fertilization in flowering plants.
(Solved)
Name two mechanisms that hinder self fertilization in flowering plants.
Date posted:
October 7, 2019
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Answers (1)
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Explain why hormone testosterone still exerts its influence even when vas deferens have been cut.
(Solved)
Explain why hormone testosterone still exerts its influence even when vas deferens have been cut.
Date posted:
October 7, 2019
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Answers (1)
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Explain the term alternation of generations.
(Solved)
Explain the term alternation of generations.
Date posted:
October 7, 2019
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Answers (1)
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The diagram below shows a phenomenon which occurs during cell division.
(Solved)
The diagram below shows a phenomenon which occurs during cell division.
(a) Name the part labeled T.
(b) (i) State the biological importance of the part labelled T.
(ii) Identify the type of cell division in which this phenomenon occurs
Date posted:
October 7, 2019
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Answers (1)
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State the roles of oviduct in female reproductive system.
(Solved)
State the roles of oviduct in female reproductive system.
Date posted:
October 7, 2019
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Answers (1)