Board : West Bengal Board of Secondary Education
Exam : SSC (Class 10th) Life Science
Document type : Sample Question Paper
Website : https://wbbse.wb.gov.in/Web/Home?l=Z%2F%2F2JeEw6P%2FkXiUjdLauQg%3D%3D
Download Sample/ Model Question Papers :https://www.pdfquestion.in/uploads/6061-Life_Sc.pdf
WBBSE Life Science Question Paper
First Unit Test Life Science Class : X
Time : 75 Minutes
Full Marks : 40
Related : West Bengal Board of Secondary Education SSC History Question Paper Sample : www.pdfquestion.in/6060.html
1. Complete the following sentence choosing the correct answer : 1×2=2
i) The shape of the lens present in human eye is — Concave / Convex / Biconvex/ Bi-concave.
ii) Which one is not an endocrine gland ? Salivary gland / Pituitary gland / Thyroid gland / Adrenal gland.
2. Answer in one sentence : 1×4=4
i) The hormone secreted from the anterior pituitary gland which regulates the secretion of thyroxine is known as . (Fill in the blank).
ii) In which part of human ear is cochlea located ?
iii) What is the name of the unit of kidney ?
iv) In human body, urea is produced in . (Fill in the blank).
3. Attempt the following questions : 2×2=4
i) Which part of your mouth can sense the bitter taste of neem leaves and why ?
ii) Mention the names and sources of two economically important exeretory products of plants.
4. Attempt the following four questions : 3×4=12
i) Write two structural and one functional differences between axon and dendron.
ii) Name three animal hormones which are not secreted from the pituitary gland and mention their sources.
iii) Write any three differences between plant and animal exeretion.
iv) Discuss the relation between neurone and nerves.
5. Write two characteristics of hormounes. Why is hormone called the “chemical messenger” ? Mention one functional difference between nervous system and endocrine system. 2+2+1=5
6. How do plants remove their excretory substances, in spite of the lack of definite exeretory organs ? Name an excretory organ in human being other than kidney. In which organ is glomerulus present in animals ? 3+1+1=5
7. Draw a neat diagram of structural and functional unit of nervous system and label any six parts. 5+3=8
Paper 2
Life Science :
Class X :
Time : 75 minutes
Full Marks : 40
1. Complete the sentence choosing the correct answer : 1×2=2
i) The main excretory organ in man is —
a) kidney, b) lung, c) skin, d) liver.
ii) Hormones are also called —
a) enzymes, b) receptor c) physical co-ordinators, d) chemical co-ordinators.
2. Answer in one sentence : 1×4=4
i) What are neurons ?
ii) What is use of the bark of cinchona plant ?
iii) Your school-garden is overgrown with reed. Which hormone will you apply to kill them ?
iv) In which part of nephrone, maximum reabsorption occurs ?
3. Answer the following question : 2×2=4
i) Write the full form of A.C.T.H. Write one function of insulin.
ii) Give two differences between axon and dendron.
iii) Name one major excertory product of each lung and liver.
4. Answer the following questions : 3×4=12
i) Mention the steps of urine formation in nephron.
ii) What is a synapse ? What is meninges ?
iii) Write three differences between hormone and enzymes.
iv) Name the parts of the middle ear. What is the importance of ear-drum in hearing?
5. Write two function of gibberelin. How is glucose regulated in the blood ? Which hormone decreases glucose level in blood. 2+1+2=5
6. What are the major parts of human brain ? Name them. Mention one function of each of cerebrum, Cerebellum and Medulla oblongata. 2+3=5
7. Draw a diagram of nephron and lavel any six parts. 5+3=8
Paper 3
Life Science :
Class X :
Time : 90 minutes
Full Marks : 50
1. Choose the correct answer and write in a complete sentence : 1×3=3
a) Give an example of an animal which reproduces by budding
(i) Yeast ; (ii) Hydra ; (iii) Earthworm ; (iv) Star Fish
b) Which one is the earliest fossil of the horse ?
(i) Pliohippus ; (ii) Merichippus ; (iii) Mesohippus ; (iv) Eohippus
c) Why can not a virus be called an organism ?
i) AS virus has DNA or RNA as the genetic material ;
ii) A virus is very tiny ;
iii) A virus acellular ;
iv) A virus infects a definite host