Biology Questions and Answers - Form 1 Mid Term 1 Exams 2023

Instructions

• Attempt all the questions in the spaces provided.

1. Define the term Biology. (1 mk)
2. Name and define the two main branches of biology. (4 mks)
3. State the name given to the following:. (2 mks)
   1. Study of living things and their surrounding.
   2. Study of inheritance and variation
   3. Study of insects
   4. Study of parasites.
4. State four ways in which study of biology is useful. (4 mks)
5.  
   1.  List eight characteristics of living organisms. (9 mks)
   2. Define each of the characteristics of living things stated in 5(a) above. (8 mks)
6.  
   1. What is a specimen? (1 mk)
   2. Explain how the following apparatus are used in collection of specimen. (3 mks)
      

      Apparatus	Use
      Sweep net
      Fish net
      Pooter
      Bart trap
      Pit fall trap
      Pair of forceps

7. Study the apparatus shown below.
          
   
   1. Name the apparatus shown. (1 mk)
   2. State the use of the apparatus. (1 mk)
   3. Name the parts
      1. A ___________________
      2. B ____________________
      3. C____________________
8. List four difference between plants and animals (4mks)
9. Outline four precautions during collection and observation of specimens. (4mks)

MARKING SCHEME

1. Define the term Biology. (1 mk)
   • Branch of science which deals with the study of living things
2. Name and define the two main branches of biology. (4 mks)
   1. Zoology – Scientific study of animals
   2. Botany – Scientific study of plants.
3. State the name given to the following:. (4 mks)
   1. Study of living things and their surrounding.
      • Ecology
   2.   Study of inheritance and variation
      • Genetics
   3. Study of insects
      • Entomology
   4. Study of parasites.
      • Parasitology
4. State four ways in which study of biology is useful. (4 mks)
   1. Solving environmental problems
   2. Entry into careers
   3. One gains scientific skills
   4. Creates international cooperation
5.  
   1. List eight characteristics of living organisms. (8 mks)
      • Nutrition
      • Respiration
      • Gaseous exchange
      • Excretion
      • Growth and development
      • Reproduction
      • IrritabilitY
      • Movement
   2. Define each of the characteristics of living things stated in 5(a) above. (9 mks)
      1. Nutrition - Process by which living organisms acquire and utilize nutrients
      2. Respiration - chemical breakdown of food to release energy.
      3. Gaseous exchange- Movement of respiratory gases across a respiratory surface
      4. Excretion – Removal of metabolic wastes from the body
      5.  
         • Growth  - is the irreversible increase in size and mass of an organism
         • Development – is irreversible increase in complexity of the organism.
      6. Reproduction – process by which living organisms give rise to new individuals of the same king.
      7. Irritability – ability to perceive change in the environment and respond appropriately.
      8. Movement – Change in position of part or whole of the organism.
6.  
   1. What is a specimen? (1 mk)
      • Its part or whole organism that is being studied/used for study of biology.
   2.  Explain how the following apparatus are used in collection of specimen. (3 mks)
       

      Apparatus	Use
      Sweep net	Catching flying insects
      Fish net	Trapping small water animals eg fish
      Pooter	Sucking small animals from surfaces
      Bart trap	Attracting and trapping small animals eg rats
      Pit fall trap	Catching crawling animals
      Pair of forceps	Picking up small crawling animals

7. Study the apparatus shown below.
   1. Name the apparatus shown. (1 mk)
      • Hand lens
   2. State the use of the apparatus. (1 mk)
      • Enlarging objects
   3. Name the parts
      1. A -  Frame
      2. B - Convex lens
      3. C - Handle
8.  
   1. List four difference between plants and animals (4mks)
      

      Plants	Animals
      Have chlorophyll hence manufacture their food	Lack chlorophyll hence feed on ready made food
      Cells have cellulose	cells have cell membrane and lack cell wall
      Respond slowly to stimulus change in environment	Quick response to stimuli
      Don’t move about	Move about for food, shelter
      Lack specialized excretory organs	Have specialized complex excretory organs

9. Outline four precautions during collection and observation of specimens. (4mks)
   1. Collect only number needed to avoid wastage
   2. Do not harm specimen during capture/collection
   3. Do not destroy the natural habitat
   4. Handle with care injurious/dangerous specimen
   5. Immobilize highly mobile animals for easy study
   6. Return live specimens to their habitat where possible.