Biology Questions And Answers - Form 1 Term 2 Opener 2021

QUESTIONS

1. Define biology (1mks)
2. Explain the meaning of the following branches of biology. (4mks)
   1. Biochemistry
   2. Cytology
   3. Anatomy
   4. Ecology
3. A student from Anestar Schools was conducting an experiment. He required different specimen state the apparatus he would use to :(3mks)
   1. Collect a stinging scorpion _____________
   2. Trap rats ____________
   3. Collect housefly _____________
4. Differentiate between growth and development. (2mks)
5. Below is an apparatus used in biological study? Study it and answer the questions that follow.
            
   1. Name the part labeled (2mks)
      A- ………………………………………………………………………………………………………………………………
      B- ………………………………………………………………………………………………………………………………
   2. State the functions of the apparatus (1mk)
   3. If the student found that it was written x 10 on the part labeled c, what does x 10 mean(1mk)
6. State four scientific skills that a student studying biology would develop (4mks)
7. Name three careers that one can pursue after learning biology. (3mks)
8. A student drew a specimen 10cm long but its actual length was 5cm. he used a hand lens to enlarge the specimen. Calculate the magnification used. (3mks
9. Both plants and animals shows movement, compare movement in plants and animals.(2mks)
10. A motor vehicle moves produces carbon (IV) oxide fumes and consumes fuel, state three characteristics of living things shown above. (3mks)
11. The scientific name for maize plant is Zea mays. Which taxonomic group does the name mays refer to? (1mk)
12.  
    1. Define species. (2mks)
    2. Give a reason why a leopard and a lion cannot breed yet they both come from genus panther.(1mk)
13. What name is given to the scientific scientific system of double naming(1mk)
14. List the five kingdoms of classification from the least complex to the most (5mks)
15. Distinguish between common and scientific names. (2mks)
16. What is the relationship between a genus and a species.(1mk)
17. Highlight the four principles used in double naming of organisms (4mks)
18. Man is scientifically referred to as homosapiens. Write the scientific name correctly.(2mks)
19. Write the taxonomic units of classification in order from smallest to largest.(7mks)
20. Some of the fish in lake Victoria include tilapiazilii atesniloticus(nile perch),tilapia variabilis, oreochromisridicusand tilapia leucastica.
    What does the name niloticus suggest?. (1mk)
21. Why is classification important? (3mks)
22. State the importance of each of the following in living organisms. (6mks)
    1. Excretion………………………………………………………………………………………………………………
    2. Nutrition…………………………………………………………………………………………………………………
    3. Reproduction……………………………………………………………………………………………………………
23. Give two uses of the energy obtained from respiration in humans.(2mks)

MARKING SCHEME

1. Define biology (1mks)
   • It is the scientific study of living things.
2. Explain the meaning of the following branches of biology. (4mks)
   1. Biochemistry – study of chemical changes inside living organism.
   2. Cytology – study of cells
   3. Anatomy – study of structure of cells.
   4. Ecology – study of living things and their surroundings.
3. A student from Anestar Schools was conducting an experiment. he required different specimen state the apparatus he would use to (3MKS)
   1. Collect a stinging scorpion- pair of forceps.
   2. Trap rats – bait trap
   3. Collect housefly – sweep net.
4. Differentiate between growth and development. (2mks)
   • Growth is the irreversible increase in size and mass development irreversible change in complexity of structures of living things.
5.  
   1. Name the part labeled (2mks)
      A-Handle
      B-Convex lens – (reject if only lens)
   2. State the functions of the apparatus (1mk)
      • Used to enlarge object.
   3. If the student found that it was written x 10 on the part labeled c, what does x 10 mean.
      • The image will be 10 times larger than the object.
6. State four scientific skills that a student studying biology would develop (4mks)
   • Observing
   • Identifying
   • Recording
   • Classing
   • Measuring
   • Analyzing
   • Evaluating
7. Name three careers that one can pursue after learning biology. (3mks)
   1. Medicine
   2. Pharmacy
   3. Dentistry
   4. Interviewing services etc
8. A student drew a specimen 10cm long but its actual length was 5cm. he used a hand lense to enlarge the specimen. Calculate the magnification used. (3mks)
   Magnification= length of drawing
                                Actual length
                     = 10cm
                         5cm
                      = ×2
9. Both plants and animals shows movement, compare movement in plants and animals. (2MKS)
   • Movement in animals include swimming , walking, running, etc while in plants it includes closing of leaves, folding of leaves, growing towards light. Etc
10. A motor vehicle moves produces carbon IV oxide fumes and consumes fuel, state three characteristics of living things shown above . (3MKS)
    • Movement
    • Gaseous exchange
    • Nutrition
11. The scientific name for maize plant is Zea Mays. Which taxonomic group does the name mays refer to? (1mk)
    • Species.
12.  
    1. Define species. (2mks)
       • Smallest unit of classification whose members naturally interbreed to produce fertile offspring.
    2. give a reason why a leopard and a lion cannot breed yet they both come from genus panther (1MK)
       • They are not from same species
13. What name is given to the scientific system of double naming(1mk)
    • Binomial nomenclature.
14. List the five kingdoms of classification from the least complex to he most (5mks)
    • Monera
    • Protoctsta
    • Fungi
    • Plantae
    • Animalia
15. Distinguish between common and scientific names. (1mk)
    • Common- local names, vernacular
    • Scientific- names known world over
      (mark as a whole)
16. What is the relationship between a genus and a species.(1mk)
    • A species is a subset of the genus
17. Highlight the four principles used in double naming of organisms (4mks)
    1. The first name is genus, begins with capital letter, second name species is written in small letter.
    2. When printed, they are italised, handwritten they are underlined separately.
    3. A newly describe organism is given a Latinized name.
    4. Specific name is frequently written with the name of scientist who first discovered it
18. Man is scientifically referred to as homosapient. Write the scientific name correctly.(1mk)
    Homo sapiens
19. Write the taxonomic units of classification in order from smallest to largest.(7mk)
    1. Species
    2. Genus
    3. Family
    4. Order
    5. Class
    6. Phylum
    7. Kingdom
20. Some of the fish in lake Victoria include tilapia zilii, lates niloticus (nile perch),tilapia variabilis, oreochromis ridicus and tilapia leucastica. What does the name niloticus suggest. (1mk)
    • it was utilized species from river Nile.
21. Why is classification important. (3mks)
    • To understand evolutionary relationships
    • Keep to arrange organism for order to avoid chaos confusion
    • Future reference
    • Brings together similar organisms
22. State the importance of each of the following in living organisms. (6mks)
    1. Excretio -removal of toxic wastes
    2. Nutrition - helps organisms obtain nutrients
    3. Reproduction -prevent extinction
23. Give two uses of the energy obtained from respiration in humans.(2mks)
    • Growth
    • Activities eg learning
    • exercise