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- Use logarithms only to evaluate.(Solved)
Use logarithms only to evaluate.
![fig116920191016.png](/questions/uploads/fig116920191016.png)
Date posted: September 16, 2019.
- The diagram below shows a mammalian eye.(Solved)
The diagram below shows a mammalian eye.
a) Name the parts labeled R, S and T.
b) Give two adaptations of part labeled U.
c) Describe the changes that occur to part V when one moves from a bright room to a dark room.
Date posted: September 16, 2019.
- The figures below represent mammalian tissue as seen under a light microscope.(Solved)
The figures below represent mammalian tissue as seen under a light microscope.
(a) Identify the tissue
(b) Name the cells represented by R,S and T
(c) State the function of structure S and R.
(d) Explain two adaptations of structure T to its function.
(e) Name the hereditary condition a person with structure T is suffering from.
Date posted: September 16, 2019.
- Study the diagrams below and answer the questions that follow.(Solved)
Study the diagrams below and answer the questions that follow.
(a) Identify the process being investigated.
(b) With a reason identify the set-up in which germination will occur.
(c) State two roles played by water during germination.
(d) Name three factors inside the seed that causes seed dormancy.
Date posted: September 16, 2019.
- State the role of carnassial teeth in a lion..(Solved)
State the role of carnassial teeth in a lion..
Date posted: September 16, 2019.
- Sulphur (IV) oxide and nitrogen (IV) oxide reacts as shown in the equation below.(Solved)
Sulphur (IV) oxide and nitrogen (IV) oxide reacts as shown in the equation below.
SO2 + NO2----->SO3(g) + NO(g)
(a) Using oxidation numbers show that this is a redox reaction.
(b) Identify the reducing agent.
Date posted: September 16, 2019.
- The diagram below shows two potted plants on a laboratory bench near a window.(Solved)
The diagram below shows two potted plants on a laboratory bench near a window.
a) State one observable difference between the plants I and II.
b) State the importance of the process that is seen in plant I.
c) Explain the process that resulted to appearance of the leaves as in plant I above.
d) Suppose a cell from a leaf of each of the plants I and II is mounted and observed under a microscope. Draw a diagram of a cell from each of the plants leaves.
Date posted: September 16, 2019.
- 25cm³ of a solution of ammonium iron (II) sulphate (NH4)2 SO4. FeSO4 nH2O with concentration of 19.6g/l was titrated with
12.5cm³ of 0.02M acidified potassium manganate...(Solved)
25cm³ of a solution of ammonium iron (II) sulphate (NH4)2 SO4. FeSO4 nH2O with concentration of 19.6g/l was titrated with
12.5cm³ of 0.02M acidified potassium manganate (VII). Given the equation.
Determine the value of n in the salt.
Date posted: September 16, 2019.
- After a colony of penicillin-sensitive bacteria was exposed to antibiotic pencillin, a penicillin resistant emerged. Explain this observation(Solved)
After a colony of penicillin-sensitive bacteria was exposed to antibiotic pencillin, a penicillin resistant emerged. Explain this observation
Date posted: September 16, 2019.
- State the importance of companion cell in phloem tissue.(Solved)
State the importance of companion cell in phloem tissue.
Date posted: September 16, 2019.
- The diagram below represents microvilli on epithelial cells(Solved)
The diagram below represents microvilli on epithelial cells
(a) Name the parts A and C
(b) Name two parts in the human body where the above epithelial cells are found.
Date posted: September 16, 2019.
- Study the crude oil fractionating column in the diagram below(Solved)
Study the crude oil fractionating column in the diagram below:
(i) How would you expect the temperature to vary from U to Y?
(ii) For each fraction given below, state at what position U, V, W, Z and Y it will be collected.
![Q169162019833.png](/questions/uploads/Q169162019833.png)
Date posted: September 16, 2019.
- During an ecological study of a lake, a group of students recorded the following observations.(Solved)
During an ecological study of a lake, a group of students recorded the following observations.
(i) Planktonic crustaceans feed on planktonic algae;
(ii) Small fish feed on planktonic crustaceans, worms and insect larvae;
(iii) Worms feed on insect larvae;
(iv) A bird species feeds on small fish, planktonic crustaceans, worms and large fish;
(v) Insect larvae feed on planktonic algae;
(vi) Large fish feed on small fish.
(a) From this record of observations, construct a food web.
(b) From the food web, isolate and write down a food chain that ends with:-
(i) Bird species as a secondary consumer.
(ii) Large fish as a tertiary consumer.
(c) The biomass of the producers in the lake was found to be greater than that of primary consumers. Explain this observation.
(d) Using the food web, identify three pairs of organisms that compete for food in the lake and for each case, name the food being competed for.
(e) (i) State three ways by which human beings may interfere with this lake ecosystem.
(i) Explain how each of the ways stated in (e) (i) above may affect life in the lake.
Date posted: September 16, 2019.
- 15cm³ of a gaseous hydrocarbon reacted completely with 45cm³ of oxygen. 30cm³ of carbon (IV) oxide were formed.
Determine the formula of the hydrocarbon given that...(Solved)
15cm³ of a gaseous hydrocarbon reacted completely with 45cm³ of oxygen. 30cm³ of carbon (IV) oxide were formed.
Determine the formula of the hydrocarbon given that all volumes of gases were measured under the same conditions of temperature and pressure.
Date posted: September 16, 2019.
- A person walked bare feet in a swampy area. After a few weeks he started experiencing abdominal pains and diarrhoea. His urine and stool contained...(Solved)
A person walked bare feet in a swampy area. After a few weeks he started experiencing abdominal pains and diarrhoea. His urine and stool contained blood.
(a) Name the disease the person was likely to be suffering from and the causative agent of the disease
(i) Disease
(ii) Causative agent
(b.) Apart from avoiding walking bare feet in swampy area. State two other ways of controlling the disease.
Date posted: September 13, 2019.
- Explain the meaning of homoiothermic.(Solved)
Explain the meaning of homoiothermic.
Date posted: September 13, 2019.
- You are provided with photographs of animals. Study the photographs and the dichotomous key below to enable you identify the taxonomic group to which each...(Solved)
You are provided with photographs of animals. Study the photographs and the dichotomous key below to enable you identify the taxonomic group to which each animal belongs.
KEY
1. a) Jointed legs present ………………………………………………………………go to 2
b) Jointed legs absent………………………………………………………………..go to 7
2. a) Three pairs of legs ………………………………………………………………..go to 3
b) More than 3 pairs of legs………………………………………………………….go to 5
3. a) Wings present …………………………………………………………………….go to 4
b) Wings absent………………………………………………………………………Anoplura
4. a) One pair of wings…………………………………………………………………Diptera
b) Two pairs of wings……………………………………………………………Hymenoptera
5. a) Four pairs of legs ………………………………………………………………… Arachnida
b) More than ten pairs of legs ………………………………………………………. go to 6
6. a) One pair of legs in each body segment…………………………………………… Chilopoda
b) Two pairs of legs in each body segment ………………………………………… Diplopoda
7. a) Body partially enclosed in a shell………………………………………………… Mollusca
b) Body surface has spiny projection…………………………………………….Echinodermata
a) Using the key, identify the following organisms to their taxonomic groups. In each case, give the sequence of steps which you followed in identifying them.
b) i) Using observable features only, state the class to which the animal labeled A and B on the photographs above belong.State two observable features on B, that enabled you to arrive at that answer in (b) (i) above.
Date posted: September 13, 2019.
- Outline four benefits received by a student who finished form four and had done business studies as a subject.(Solved)
Outline four benefits received by a student who finished form four and had done business studies as a subject.
Date posted: September 13, 2019.
- The following information relates to Kawira Traders on 31st January 2018:(Solved)
The following information relates to Kawira Traders on 31st January 2018:
Calculate:
(a) Closing stock.
(b) Rate of stock turnover for the year.
Date posted: September 13, 2019.
- Study the reaction below and answer the questions that follow.(Solved)
Study the reaction below and answer the questions that follow.
a) What biological processes are represented by A and B?
b) Identify the product Y.
c) State the bond represented by X.
Date posted: September 13, 2019.
- Outline four expenditure items that are included in the measurement of national income under the expenditure approach.(Solved)
Outline four expenditure items that are included in the measurement of national income under the expenditure approach.
Date posted: September 13, 2019.
- Highlight four emerging issues in communication.(Solved)
Highlight four emerging issues in communication.
Date posted: September 13, 2019.
- Complete the table below for business A, B, C and D.(Solved)
Complete the table below for business A, B, C and D.
Date posted: September 13, 2019.
- A student divided a small air tight box into two chambers with wire mesh. In one chamber he kept a number of rats and in...(Solved)
A student divided a small air tight box into two chambers with wire mesh. In one chamber he kept a number of rats and in the other a number of potted plants. What was likely to happen if the box was placed in the dark for two hours? Explain your answer.
Date posted: September 13, 2019.
- Name four source documents which are used to provide information used to make entries in the books of accounts.(Solved)
Name four source documents which are used to provide information used to make entries in the books of accounts.
Date posted: September 13, 2019.
- Give four circumstances when pipeline would be more preferred as a means of transport.
(Solved)
Give four circumstances when pipeline would be more preferred as a means of transport.
Date posted: September 13, 2019.
- State four problems that are usually encountered in the formulation stage of a development plan.(Solved)
State four problems that are usually encountered in the formulation stage of a development plan.
Date posted: September 13, 2019.
- Describe what happens in the first phase of aerobic respiration.(Solved)
Describe what happens in the first phase of aerobic respiration.
Date posted: September 13, 2019.
- Name the international trade documents that relates to each of the following statements.(Solved)
Name the international trade documents that relates to each of the following statements.
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Date posted: September 13, 2019.
- State one example of chromosomal mutation that lead to
(i) Change in chromosomal structure
(ii) Change in chromosomal number(Solved)
State one example of chromosomal mutation that lead to
(i) Change in chromosomal structure
(ii) Change in chromosomal number
Date posted: September 13, 2019.