Complete dominance is when an alliele completely surprises another intermediate fruits.
Incomplete dominance is when heterozygous organisms show an intermediate trait.
marto answered the question on October 7, 2019 at 10:11
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In an experiment the radicle of a seedling was marked equidistant using Indian ink as shown in the diagram below.
(Solved)
In an experiment the radicle of a seedling was marked equidistant using Indian ink as shown in the diagram below.
(a) What was the aim of the experiment?
(b) On the diagram below mark on the radicle to show the appearance of the marks after 3days
(c ) State three characteristics of cells found just behind the root cap of a radicle
(d) Give two factors inside a seed that causes seed dormancy
Date posted:
October 7, 2019
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Answers (1)
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Carefully study the figure below and answer the questions that follow:-
(Solved)
Carefully study the figure below and answer the questions that follow:-
The seedling with straight radicle and plumule was attached to a machine horizontally as shown above. The machine rotates making one revolution in 15 minutes.
(a) Draw how the seedling would look like after one week
(b) Explain your drawing in (a) above
(c) Name the machine used in the experiment above
(d) What would happen if the seedling was put horizontally outside the machine
(e) Name the stimuli investigated and type(s) of response expected in the experiment
Date posted:
October 7, 2019
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Answers (1)
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The relationship between seed fresh mass in the lupin lupinus and percentage seed germination, percentage seedling survival and seedling fresh mass is shown in the...
(Solved)
The relationship between seed fresh mass in the lupin lupinus and percentage seed germination, percentage seedling survival and seedling fresh mass is shown in the table.
a) How was percentage germination in column two of the table calculated?
b) Why was seed fresh mass preferred to seed dry mass to take measurements of the seed weight in the experiment
c)
i) Explain why the measurements of mean seedling fresh mass (5) weeks after germinated may not have been an accurate measurement of growth that had occurred.
ii) How could more meaningful and accurate measurement been obtained in c(i) above?
d) With reference to the figures in the taste indicate the relationship between seed fresh mass and percentage seed germination, percentage seedling survival and seedling fresh mass.
e) Suggest an explanation why seedling produced from large seeds grow more rapidly than the
seedling produced from small seeds
Date posted:
October 7, 2019
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Answers (1)
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The diagram below represents a set-up that was used to investigate the effect of rotation on the growth of a bean radicle. The set-up allowed...
(Solved)
The diagram below represents a set-up that was used to investigate the effect of rotation on the growth of a bean radicle. The set-up allowed the seedling to rotate slowly and continuously for seven days.
(a) Name the piece of apparatus illustrated.
(b)
(i) State the observation made on the shape of the radicle after seven days
(ii) Explain the observation in (b) (i) above
(c) Suggest a suitable control for this experiment.
(d) Give any four importance of tropism in plants.
Date posted:
October 7, 2019
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Answers (1)
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The following data represents the development in dry mass of germinating seedlings within 18 weeks:
(Solved)
The following data represents the development in dry mass of germinating seedlings within 18 weeks:
(a) Write reference to the graph, explain the changes in dry mass between:-
(i) Week 0 to 2
(ii) Week 5 to 13
(iii) Week 16 - 18
(b)
(i) What is the significance of time zero?
(ii) What difference would be expected from the above results if the experiment started with the seeds? Give a reason for your answer
(c)
(i) Describe how you carry out the experiment to obtain dry mass in the respective weeks
(ii) State one advantage of using dry mass instead of fresh weight in estimating growth of an organism
Date posted:
October 7, 2019
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Answers (1)
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The experiment set – up below was designed to investigate an aspect of germination.
(Solved)
The experiment set – up below was designed to investigate an aspect of germination.
a) Why was potassium hydroxide pellets used in this experiment?
b) What was the role of moist cotton wool in this experiment?
c) i) By means of an arrow, indicate on the diagram the direction in which red dye would move
during the experiment.
ii) Give reason for your answer in c(i) above.
d) Other than the factor investigated above, state any other one factor necessary for germination
process.
Date posted:
October 7, 2019
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Answers (1)
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The diagram below represents a stage during the process of germination.
(Solved)
The diagram below represents a stage during the process of germination.
(a) (i) Name the type of germination illustrated in the diagram
(ii) Give a reason for your answer in (a) (i) above.
(b) Give two functions of the part labelled X
Date posted:
October 7, 2019
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Answers (1)
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The diagram below represents a growth pattern of arthropods.
(Solved)
The diagram below represents a growth pattern of arthropods.
(a) Name the type of growth pattern represented on the graph.
(b)Identify the process represented by X.
(c) Which hormone is responsible for process at X in (b) above?
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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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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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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The diagram below illustrate a process in a given species of organism.
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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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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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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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The diagram below represents a mammalian nephron.
(Solved)
The diagram below represents a mammalian nephron.
(a) Name the structures labeled B,C and D
(c) Name the process by which substances are reabsorbed from structure C into blood capillaries
(d) How is the pressure in structure A achieved?
Date posted:
October 7, 2019
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Answers (1)
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Describe the path taken by urea from the organ where it is formed until it is released from the human body.
(Solved)
Describe the path taken by urea from the organ where it is formed until it is released from the human body.
Date posted:
October 7, 2019
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Answers (1)