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- Some form three students took a germinating maize grain and placed it in a starch paste in a petri dish and put the Petri dish...(Solved)
Some form three students took a germinating maize grain and placed it in a starch paste in a petri dish and put the Petri dish in a water bath maintained at 30oC. After 48 hours the starch paste was irrigated with iodine solution .The area around the maize grain changed to the colour of iodine solution while the rest turned blue –black.
(a) Account for the observation
(b) Why was the Petri dish put in a water bath maintained at 30oC?
Date posted: September 16, 2019.
- (a)Bag A contains 4 red balls and 5 white balls while bag B contains 6 red balls and 4 white ones.
(i)A bag is picked at...(Solved)
(a)Bag A contains 4 red balls and 5 white balls while bag B contains 6 red balls and 4 white ones.
(i)A bag is picked at random and a ball is picked, find the probability that the ball is
white.
(ii)A ball is removed from A and placed in bag B. Two balls are then picked from B at random one at a time without replacement; find the probability that the two balls are of the same colour.
(b)Three boys and three girls sit in a row of six seats. Find the probability that:-
(i)Three girls sit together.
(ii)The girls and boys sit in alternative seats.
Date posted: September 16, 2019.
- A1B1C1D1 is the image of ABCD under a shear parallel to x – axis D(2,4) is mapped onto D1(1,4) while A(-1,1) is mapped onto A1(1,1)....(Solved)
A1B1C1D1 is the image of ABCD under a shear parallel to x – axis D(2,4) is mapped onto D1(1,4) while A(-1,1) is mapped onto A1(1,1). If the co – ordinates of A,B,C and D are (-1,1), (0,1), (3,4) and (2,4) respectively:-
(a)Draw ABCD and A1 B1C1 and D1 under the shear on the grid provided and state
Co-ordinates of B1 and C1.
(b)State the invariant line.
(c)A1 B1C1 and D1 undergoes a stretch parallel to y – axis with scale factor -2 and invariant line y =3. On the same grid, draw A//B//C//D// the image of A1 B1C1 D1 under the stretch
(d)Describe completely the transformation that maps A//B//C//D// onto ABCD.
Date posted: September 16, 2019.
- The table below shows marks obtained by 80 form four pupils in an examination.
(a)draw an Ogive curve.
(b)Use your graph to determine:-
(i)The median mark.
(ii)The quartile deviation.
(iii)The...(Solved)
The table below shows marks obtained by 80 form four pupils in an examination.
(a)draw an Ogive curve.
(b)Use your graph to determine:-
(i)The median mark.
(ii)The quartile deviation.
(iii)The range of marks obtained by the middle 60%.
Date posted: September 16, 2019.
- The diagram below represents a simple endocrine feedback mechanism in a human male.(Solved)
The diagram below represents a simple endocrine feedback mechanism in a human male.
(a) Name the hormone labeled X
(b) State two differences that may be observed between a normal male and one who is incapable of producing hormone labeled Y
Date posted: September 16, 2019.
- What are the functions of the odontoid process found on the axis bone of the cervical vertebra?(Solved)
What are the functions of the odontoid process found on the axis bone of the cervical vertebra?
Date posted: September 16, 2019.
- Active yeast cells were added to a dilute sugar solution in a container. The mixture was kept in a warm room. After a few hours...(Solved)
Active yeast cells were added to a dilute sugar solution in a container. The mixture was kept in a warm room. After a few hours bubbles of gas were observed escaping from the mixture.
(a) Write an equation to represent the chemical reaction above.
(b) What is the economic importance of this type of chemical reaction in industry?
Date posted: September 16, 2019.
- In which part of the spinal cord is the cell body of the motor neurone found?.(Solved)
In which part of the spinal cord is the cell body of the motor neurone found?.
Date posted: September 16, 2019.
- State the role of the swim bladder in a fish.(Solved)
State the role of the swim bladder in a fish.
Date posted: September 16, 2019.
- Name the division of the Kingdom plantae with the following spore producing bodies.
(i) Sori
(ii) Capsule(Solved)
Name the division of the Kingdom plantae with the following spore producing bodies.
(i) Sori
(ii) Capsule
Date posted: September 16, 2019.
- A small amount of chemical M was put on one side of maize celeoptiles. After some days, it was noted that the celeoptiles curved away...(Solved)
A small amount of chemical M was put on one side of maize celeoptiles. After some days, it was noted that the celeoptiles curved away from the side to which the chemical was applied.
(a) Suggest the possible identity of chemical substance M
(b) Explain how this chemical might have caused the celeoptiles to curve.
Date posted: September 16, 2019.
- In a blood test, a few drops of anti-B serum were added to two samples of blood. It was noted that agglutination occurred.What were the...(Solved)
In a blood test, a few drops of anti-B serum were added to two samples of blood. It was noted that agglutination occurred.What were the possible blood groups of the two blood samples?
Date posted: September 16, 2019.
- Use a ruler and compass ONLY for all constructions in this question.
(a)Construct a triangle ABC in which AB=6 cm, BC= 7 cm and angle ABC...(Solved)
Use a ruler and compass ONLY for all constructions in this question.
(a)Construct a triangle ABC in which AB=6 cm, BC= 7 cm and angle ABC = 750.
(b)Measure
(i)the length of AC
(ii)the angle ACB
(c)(i)Construct the locus of p such that BP = PC
(ii)Construct the locus of Q such that Q is on the opposite side of BC as A and angle
BCQ = 300.
(d)(i)the locus of P and Q meet at X, mark X .
(ii)Construct the locus of R in which angle BRC = 1200.
Date posted: September 16, 2019.
-
State the stage in cell division in which the exchange of genetic material occurs(Solved)
State the stage in cell division in which the exchange of genetic material occurs
Date posted: September 16, 2019.
- State the stage in cell division in which the replication of the genetic material occurs.
(Solved)
State the stage in cell division in which the replication of the genetic material occurs.
Date posted: September 16, 2019.
- The table below shows taxation rates in Kenya.
A civil servant is provided with a house and pays a nominal rent of Ksh. 6260 per Month....(Solved)
The table below shows taxation rates in Kenya.
A civil servant is provided with a house and pays a nominal rent of Ksh. 6260 per Month. In addition the government gives him a medical allowance of Kshs. 7,000 p.m, entertainment allowance of Kshs. 3,000 p.m. He is entitled to a personal relief of Ksh. 1700 p.m. If the civil servants net tax is Kshs. 6,900 p.m.
Determine his :-
(a)Gross tax p.m
(b)Taxable income p.m
(c)Basic salary p.m
Date posted: September 16, 2019.
- Industrial wastes may contain metabolic pollutants. State how such pollutants may indirectly reach and accumulate in the human body if the wastes were dumped into...(Solved)
Industrial wastes may contain metabolic pollutants. State how such pollutants may indirectly reach and accumulate in the human body if the wastes were dumped into rivers.
Date posted: September 16, 2019.
- During a charity walk to raise funds for displaced Kenyans in the election violence, Otieno, Omollo and David decided to walk from Kisumu to kisii...(Solved)
During a charity walk to raise funds for displaced Kenyans in the election violence, Otieno, Omollo and David decided to walk from Kisumu to kisii a distance of 250km, at an average speed of 4 km/hr. Each day they begin their walk at 6.00 a.m and after walking 4 hrs, take a break of 30 minutes then walk for the next 3 hrs after which they have a lunch break for 1 ½ hrs. Their final leg for the day last 3 hours.
(a)Find the time:-
(i)When their first break ends.
(ii)When their lunch time begins.
(iii)When their day ends.
(b)Find the number of days they will take to complete the journey.
Date posted: September 16, 2019.
- Study the photographs U, V, W and X showing fruit specimens that are open to expose the internal parts.(Solved)
Study the photographs U, V, W and X showing fruit specimens that are open to expose the internal parts.
Identify the type of fruit in photograph: W and U
Date posted: September 16, 2019.
- Make N the subject of the formula.(Solved)
Make N the subject of the formula.
![fig6316920191428.png](/questions/uploads/fig6316920191428.png)
Date posted: September 16, 2019.
- In the figure below AB is parallel to DE and area of triangle DEC is 8cm2.
Find
(a)the value of X
(b)the area of triangle ADEB.
(Solved)
In the figure below AB is parallel to DE and area of triangle DEC is 8cm2.
Find
(a)the value of X
(b)the area of triangle ADEB.
Date posted: September 16, 2019.
- The apparatus whose diagram is given below can be used to demonstrate results of a physiological process that occurs in a mammal. To use the...(Solved)
The apparatus whose diagram is given below can be used to demonstrate results of a physiological process that occurs in a mammal. To use the apparatus, the experiment places his mouth at the point marked X and breaths in and out gently.
a. State the observations in the boiling tube when the experimenter
i) Breaths in:
Boiling tube, A
Boiling tube, B
b) Breaths out:
Boiling tube, A
Boiling tube, B
c. What conclusions can you draw from the results of this experiment
d. What is the purpose of the boiling tube A?
Date posted: September 16, 2019.
- A patient whose blood group is A died shortly after receiving blood from a person of blood group B. Explain the possible cause of the...(Solved)
A patient whose blood group is A died shortly after receiving blood from a person of blood group B. Explain the possible cause of the death of the patient.
Date posted: September 16, 2019.
- Construct a step in a dichotomous key using two animals one with two pairs of legs and the other with four pairs of legs.(Solved)
Construct a step in a dichotomous key using two animals one with two pairs of legs and the other with four pairs of legs.
Date posted: September 16, 2019.
- The diagram below shows the difference in growth response to varying hormone concentration by root and shoot(Solved)
The diagram below shows the difference in growth response to varying hormone concentration by root and shoot
What is the effect of increasing auxin concentration on:
i) Roots
ii) Shoot
Date posted: September 16, 2019.
- State two ways in which human body is naturally protected against harmful bacteria.(Solved)
State two ways in which human body is naturally protected against harmful bacteria.
Date posted: September 16, 2019.
- Complete the table below on mineral nutrition in plants.(Solved)
Complete the table below on mineral nutrition in plants.
![pic16920191354.png](/questions/uploads/pic16920191354.png)
Date posted: September 16, 2019.
- State one major importance of convergent evolution to living organisms.(Solved)
State one major importance of convergent evolution to living organisms.
Date posted: September 16, 2019.
- If is a perfect square. Find the value of B.(Solved)
If
is a perfect square. Find the value of B.
Date posted: September 16, 2019.
- A computer whose marked price is sh. 40,000 is sold at sh. 56,000 on hire purchase terms. Mary bought the computer on hire purchase terms....(Solved)
A computer whose marked price is sh. 40,000 is sold at sh. 56,000 on hire purchase terms. Mary bought the computer on hire purchase terms. She paid a deposit of 25% of the hire purchase and cleared the balance by equal Monthly installments of sh. 2625. Calculate the rate of interest charged per Month.
Date posted: September 16, 2019.