OPENER BIOLOGY GRADE 10 MS

GRADE 10 BIOLOGY TERM 3: OPENER ASSESSMENT - MARKING SCHEME

SECTION A

1. a) Define Biology. (1mark)Biology is the branch of science that deals with the study of living things/organisms.

b) State two main branches of Biology. (2marks)Zoology; Botany; Microbiology;. (Any 2, 1 mark each)

2. Name two careers related to Biology. (2marks)Medicine; Nursing; Veterinary medicine; Pharmacy; Teaching; Dentistry. (Any 2, 1 mark each)

b. State two applications of Biology in agriculture. (2mks)Breeding of disease-resistant plants and animals; biological control of pests; artificial insemination; understanding soil nutrients and fertilizer application. (Any 2, 1 mark each)

3. Identify two apparatus used to collect specimens in the field. (2marks)Sweep net; Pooter; Pitfall trap; Bait trap; Specimen bottles; Forceps. (Any 2, 1 mark each)

4 a) State three reasons why it is important to preserve specimens properly. (3 marks)- To prevent them from rotting or decaying.- To maintain their original shape and structure for accurate study.- To store them for future reference or exhibitions. (1 mark each)b) State one apparatus and one chemical substance used to preserve the specimen (2mks)Apparatus: Specimen bottle. Chemical substance: Formalin / Formaldehyde / Ethanol.

c) State any three precautions that should be taken when collecting specimens. (3 marks)- Do not destroy the natural habitat of the specimens.- Do not collect more specimens than are needed.- Handle dangerous or stinging specimens with care (e.g., using forceps or gloves).

- Wear protective gear

-enhance team work for the safety of learner and also to avoid hazardous environment - Do not uproot the whole plant if only specific parts are required. (Any 3, 1 mark each)

d) Explain how different, Zoology and Botany are as branches of Biology. (2 marks)Zoology is the study of animals, whereas Botany is the study of plants.

5 a) Give three characteristics of living things that motor vehicles lack. (3 marks)Growth and development; Reproduction; Irritability/Sensitivity; . (Any 3, 1 mark each)

. b) State other three characteristics of living organisms. (3marks)Nutrition; Respiration; Excretion; Movement. (Any 3, 1 mark each)

6. Match the cell type with its function; (4marks)- Red blood cell: B. Transport oxygen- Nerve cell: A. Transmission of impulses- White blood cells: D. kills pathogens in living organisms- Root hair cell: C. Absorbs water and mineral salts

7. a) Name two classes of food nutrients. (2marks)Carbohydrates; Proteins; Lipids (fats and oils); Vitamins; Minerals. (Any 2, 1 mark each)