Life Science class 10 English Medium 1st Summative test. April 2023.
Long question practice paper 5 marks Time: 60mins
1. Draw a clear picture of neurone and make pointing
a) Axon hillock b) nissle granules , c,) Schwan cell d) terminal button .
2. Make a clear picture of reflex arc and labell a) receptor b) afferent nerve ,c) neuro centre and d) motor nerve .
4. What is parthenocarpy ? Write the role artificial hormone in agriculture .
5. What are local harmones ? Write the name and function of two hormones secreted form posterior pituitary .
6. What is reflex action ? Mention its type . Give the example of unconditional and conditional reflex action .
7. What do you mean by nervous system . Classify - the human nervous system .
8. Mention the nucleic acids of chromosome . Write down the chemical components of nucleic acid .
9. Give a brief account of amitosis cell division . Mention two differences in between amitosis and mitosis
10. Draw a neat diagram of Vertical section of the eyeball of human eye and lable the following parts (a) Choroid (b) Optic nerve (c) Iris (d) Yellow Spot.
11. Draw a neat diagram of metaphase of mitotic cell division in an animal cell and lebel the following
(a) Chromatid (b) Centromere (c) Polar region (d) Spindle fibre
11. Describe the following parts of human brain and mention the functions of each
a. Cerebellum b. Pons c. Hypothalamus. d. Medulla oblongata Thalamus.
12. How does accomodation of eye help to avoid the risks and hazards-cite five such situations.
13. Evaluate the role of synthetic hormones in the following
a Delay of Preharvest fruit
b. Control of weed
c. Developing parthenocarpic fruit.
How auxin hormone helps in tropic movement?
14. Predict the causes of following disorders- a Dwarfism b Goitre c Diabetes mellitus
"Insulin and Glucagon are antogonistic hormone" defend the statement.
15. Distinguish between mitotic and meiotic cell divisions in animals on the basis of the following features (a) Site of occurrence (b) Number of Cells Produced (c) Nature of Division of Chromosomes.
