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KCSE Past Papers  Biology Paper 1 2019 (231/1)

Kenya Certificate of Secondary Education

2019 Biology Paper 1

Answer all the questions in the spaces provided.

1. Name the characteristic of living organisms illustrated by each of the activities described below: (a) Dressing heavily (1 mark)

(b) Bursting of the sporangium in the Rhizopus sp (1 mark)

2. (a) Besides venation, state two other external characteristics of leaves that can be used to classify plants.(2 mark)

(b) Explain why the bat is classified as a mammal yet it flies.(2 mark)

3. The diagram below illustrates a specialised cell obtained from a certain tissue.

(a) Name the cell.(2 mark)

(b) State two ways in which the cell is structurally adapted to its function. (2 marks)

4. In investigating a certain pliysiological process, students set up the apparatus as shown below and made the observation after 30 minutes as illustrated.

(a) Name the physiological process being investigated.(1 mark)

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(b) Account for the observation made at the end of the experiment.(3 mark)

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(c) State the likely identity of G.(3 mark)

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5. Explain why significantly increasing the blood pH slows down the rate of selective reabsorption of materials in the kidney tubules. (3 marks)

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6. (a) Name the respiratory structure in the amoeba.(1 mark)

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(b) Give a reason for your answer in (a) above.(1 mark)

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7. Distinguish between chemical and mechanical digestion.(1 mark)

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g. State the role of each of the following in the mammalian respiratory system:

(a) mucus (2 mark)

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(b) cartilage rings (1 mark)

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(c) epiglottis (1 mark)

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9. Below is a photograph of Brassica oleracea, Sukuma wiki leaf.

(a) State two observable features that adapt the leaf to gaseous exchange. (2 marks)

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10. In an investigation, students set up the apparatus below in the laboratory and made observations after 72 hours.

(a) Explain how inclusion of the following components would affect the mouse in the experiment:

(i) light (2 marks)

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(ii) sodium hydroxide solution (2 marks)

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11. Explain each of the following physiological observation :

(A) Sportsmen release little, concentratcd urine at the end Of a strenuous exercise (3 marks)

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(b) A rabbit has a higher oxygen demand than a camel (3 marks) ——————————————————————————

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12. While investigating a certain metabolic process in plants, students set up the apparatus as shown below in a classroom and monitored it for 48 hours.

(a) Identify the metabolic process under investigation.(1 mark)

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(b) Account for the observations made in the test tube at the end of the investigation. (2 Marks)

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13. A female human being was found to have an extra sex chromosome in her cells.

(a) Give the total number of chromosomes in the female individual’s cells.(1 Marks)

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(b) Explain the possible cause of this condition.(2 Marks)

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(c) State two physical characteristics observed in the female individual with such a condition. ———————————

14. (a) Explain why fossil records as evidence of organic evolution are usually incomplete.(3 marks) ———————————————-

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(b) Name the evidence of organic evolution exhibited by occurrence of similar amino acid molecules in a range of organisms. (1 Marks)

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15. (a) Distinguish between guttation and transpiration.(1 Marks)

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(b) State the significance of transpiration to a plant.(2 Marks)

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16. State two benefits of mutation in living organisms. (2 Marks)

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17. Below are photographs of two dogs.

Explain the possible reason for the difference in the length of their fur. (2 mark)

18. Name the type of t00th in carnivores mainly used for piercing and killing of preys. (1 mark)

19. Below is a diagram of the human digestive system.

(a) Label with Y on the diagram where enzyme amylase is produced. (2 marks)

(b) Besides the digestive role, explain one other function of the part labelled H. (2 marks)

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20. State how each of the following features enhance efficient movement of fish in water.

(a) Scale (1 mark)

(b) body shape (1 mark)

21. Make a diagram of a simple, bilobed leaf with a serrated margin.(3 mark)

22. The chart below illustrates how respiratory gases are transported in the human blood.

(a) Identify gas Q. (I mark)

(b) Explain the advantage oxyhaemoglobin has over carboxyhaemoglobin.(2 mark)

23. State three homeostatic roles of the liver. (3 marks)

24. (a) Plasmodium vivax and P lasmodium ovale are transmitted by a mosquito. State with a reason whether the tWo organism s can interbreed. (2 marks)

(b) Explain the evolutionary basis for the ever changing drugs for malaria treatment. (2 marks)

25. State one characteristic of muscles responsible for each of the following:

(a) peristaltic movement (1 marks)

(b) movement of limbs (1 marks)

 

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Due to numerous inquiries from parents, teachers, and the 2019 KCSE Candidates on the procedure on how they can download the examinations result-slip online, I present this simple guide.

What you need before starting to download the KCSE result slip:

• Secondary School KNEC Portal Username
• Secondary School KNEC Portal Username
• 2019 KCSE Candidate’s Index Number

Procedure on How to Download the KCSE 2019 KCSE Result Slip Online via KNEC Portal

To access the 2019 Kenya Certificate of Secondary Education, KCSE, Result Slip, Go to the Kenya National Examinations Council, KNEC, online portal.

Let me vividly outline the steps:

1. Using a Computer with an internet connection, open your preferred web browser.
2. Enter the following KNEC Portal URL address; https://www.knec-portal.ac.ke/.
3. Sign in to the KNEC portal and enter the School Username and Password.
4. On signing in, you can view the summary of the KCSE Results.
5. Sort Out the results by entering the candidate’s index number in the box titled “FROM INDEX” and “TO INDEX NUMBER.”
6. Then, click on the “View Report” button. Automatically, the result slip with student’s grades will be displayed.
7. Click the “Export function” to download the Result slip in the document format of your choice.

That’s it, you have downloaded the KCSE 2019 Result slip. You can send it wherever you want.

Method to Check KCSE 2019 Results

The 2019 KCSE Candidates can check the results of their examination using a mobile phone or through the internet.

As candidate send ‘ your index number’ followed with ‘KCSE’ to 20076.

You will be charged Kshs.25 above the standard SMS rates for a message sent.

Alternatively, check the KCSE 2019 examinations results free of charge through the KNEC website.

Go to KNEC website through this link https://www.knec-portal.ac.ke/

Pioneer Girls High School is a private secondary school in Gatanga that managed to post a stunning school mean of 7.832 to emerge among the top best schools in KCSE 2019 Examination results in Murang’a County.

Pioneer Girls’ High School is a Girls’ boarding secondary school in Murang’a County.

95 candidates from the school sat for the 2019 KCSE examinations and 68 out of them managed the KUCCPS university direct entry.

The candidates who scored grade C and below are only 27 and among the no one scored a mean grade of E.

Pioneer Girls’ High School KCSE 2019 Results

Here are the KCSE 2019 results for Pioneer Girls’ High School, Murang’a County.

Details about Pioneer Girls’ High School

• Phone: 0705 723030
• Website: http://pioneergirlsschool.co.ke/

In 2019 KCSE examination results, Kahuhia Girls’ High School an extra-County Secondary School in Kahuro Sub-County, posted a good school mean score of 8.543 to emerge the third top best school in Murang’a County.

Kahuhia Girls’ High School is a Girls’ boarding secondary school in Murang’a County.

269 candidates from the school sat for the 2019 KCSE examinations, and 240 out of them managed the KUCCPS university direct entry.

Despite being an extra county school only 29 students scored a mean grade of C and below.

The school did not have any student scoring D, D- or E grade.

Kahuhia Girls’ High School KCSE 2019 Results

Here are the KCSE 2019 results for Kahuhia Girls’ High School, Murang’a County.

 

Details about Kahuhia Girls High School

• Physical Location: Off Muranga-Kangema Road.
• Address: P.O BOX 66-10206 ,Kahuhia.
• City/Town : Murang`a. County:
• Code : Phone Number: 0727 288234.
• Address‎: ‎P.O BOX 66-10206 ,Kahuhia
• Email‎: ‎info@kahuhiagirls.ac.ke/
• Phone Number‎: ‎0727 288234

Njiiri School is an extra County secondary school in Kigumo that managed to post a stunning school mean of 8.328 to emerge among the best schools in Murang’a County.

Njiiri School is a Boy’s boarding secondary school in Murang’a County.

387 candidates from the school sat for the 2019 KCSE examinations, and 310 out of them managed the KUCCPS university direct entry.

The candidates who scored grade C and below were only 79 and among them, no one scored a mean grade of D- and E.

Njiiri School KCSE 2019 Results

Here are the KCSE 2019 results for Njiiri School, Murang’a County.

Details about Njiiri School

• Website: https://njiirischool.sc.ke
• Email adress: info@njiirischool.sc.ke.
• Phone: +254 789 1050 77.

In the middle of the coronavirus global pandemic, the Teachers Service Commission, TSC, has said that it will not pay over 3,500 teachers and secretariat staff who by the 14th of January 2020 failed to file their wealth declaration.

The commission released the sad news through a circular dated the 14th of April 2020.

In the circular, TSC CEO said, those who did not comply with the government’s directive of filing the wealth declaration online have been removed from the TSC payroll.

However, the commission says that those teachers will only be returned to the payroll after meeting certain conditions.

The conditions stated by TSC includes; writing a letter through the headteacher or principal or supervisor, explaining why they did not follow the instructions set by the government of declaring their wealth.

Besides, their immediate supervisors must confirm that the teachers or the workers are currently active.

The circular reads ” The Headteacher/Principal/Supervisor to confirm in writing, that the employee has been in active service, and /or has been teaching all along”

After writing the letter it should be signed by the supervisor, and forwarded to the teachers service commission headquarters through the county director stroke sub-county director, says the circular.

All the Kenyan government employees were mandated by law to file their wealth declarations online for the year 2017/2019. The procedure entailed declaring individual Income, Assets, and Liabilities by the 31st of December 2019 through the Wealth Declaration online portal.