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Maharashtra SSC Class 10 Science and Technology II March 2024 question paper

Maximum marks 40 · Time 2 hours

Try each question first, then open its model answer. Where the paper offers a choice, both questions are shown with OR between them.

Q.1 (A)

1 mark each

  1. Q.1 (A) (i)1 mark
    Regeneration occurs in ____.

    Tap an option to check your answer.

  2. Q.1 (A) (ii)1 mark
    Lactobacillus brevis gives us the beverage ____.

    Tap an option to check your answer.

  3. Q.1 (A) (iii)1 mark
    A minor change that occurs due to a change in the position of any nucleotide is termed as ____.

    Tap an option to check your answer.

  4. Q.1 (A) (iv)1 mark
    The atomic power plant in Maharashtra is ____.

    Tap an option to check your answer.

  5. Q.1 (A) (v)1 mark
    An example of phylum Arthropoda is ____.

    Tap an option to check your answer.

Q.1 (B)

1 mark each

  1. Q.1 (B) (i)1 mark
    Pick the odd man out: duckbill platypus, pomfret, lungfish, peripatus.
  2. Q.1 (B) (ii)1 mark
    Write the co-relation: Skin : Melanin :: Pancreas : ____
  3. Q.1 (B) (iii)1 mark
    State true or false: Production of various useful aquatic organisms with the help of water is called blue revolution.
  4. Q.1 (B) (iv)1 mark
    Write the full form of WHO.
  5. Q.1 (B) (v)1 mark
    Match the pair: 'A' — (1) Male ; 'B' — (a) 44+XX44 + XX, (b) 44+XY44 + XY, (c) 44+YY44 + YY.

Q.2 (A)

2 marks each · attempt any 2

  1. Q.2 (A) (i)2 marks
    Give scientific reason: Though a tortoise lives on land as well as in water, it cannot be included in class Amphibia.
  2. Q.2 (A) (ii)2 marks
    Give scientific reason: Hydroelectric energy, solar energy and wind energy are called renewable energies.
  3. Q.2 (A) (iii)2 marks
    Give scientific reason: We feel tired after exercise.

Q.2 (B)

2 marks each · attempt any 3

  1. Q.2 (B) (i)2 marks
    Write four adverse effects of radiations on the human body.
  2. Q.2 (B) (ii)2 marks
    Redraw and complete the given chart of 'Factors affecting the Social Health' (four factors).
  3. Q.2 (B) (iii)2 marks
    Write any four important facts which must be thought over while considering the scope of disaster.
  4. Q.2 (B) (iv)2 marks
    Name two fuels obtained by microbial processes. Why is it necessary to increase the use of such fuels?
  5. Q.2 (B) (v)2 marks
    What is DNA fingerprinting? Where is it mainly useful?

Q.3

3 marks each · attempt any 5

  1. Q.3 (i)3 marks
    (a) What are vitamins? (b) Classify them according to their solubility. (c) Give one example of each type as per the above classification.
  2. Explain the following terms:
    Q.3 (ii) (a)3 marks
    Explain the term: Stem cells.
  3. Q.3 (ii) (b)
    Explain the term: Cloning.
  4. Q.3 (ii) (c)
    Explain the term: Genetically modified crops.
  5. Q.3 (iii)3 marks
    Complete the given paragraph by filling the blank spaces from the options given in the bracket. [oxygen, pyridines, mechanical, CO2CO_2, petroleum, fatal, polyester, norcadia] Spilling of ____ oil occurs in the ocean due to various reasons. This oil may prove ____ and toxic to aquatic organisms. It is not easy to remove the oil layer from the surface of water by ____ method. However, bacteria like Pseudomonas spp. and Alcanovorax borkumensis have the ability to destroy the ____ and other chemicals. Hence, these bacteria are used to clear the oil spills. These are called hydrocarbonoclastic bacteria (HCB). HCB decompose the hydrocarbons and bring about the reaction of carbon with ____ . ____ and water is formed in this process.
  6. Q.3 (iv)3 marks
    Observe the given picture and answer the questions: (a) Identify the given diagram. (b) What is the source of energy in this project? (c) Why is this source supposed to be eco-friendly?
  7. Q.3 (v)3 marks
    Complete the following chart of 'Hobbies helpful to overcome stress' (six hobbies).
  8. Q.3 (vi)3 marks
    Write the names of any six materials which are to be in the first aid box.
  9. Q.3 (vii)3 marks
    (a) Define vestigial organs. (b) Write the names of any two vestigial organs in the human body. (c) Write the name of those animals in which these vestigial organs are functional.
  10. Read the statements and answer accordingly (identify the group and give one example):
    Q.3 (viii) (a)3 marks
    Calcareous spines are present on the body. Tube feet are used for locomotion and for capturing prey also. — Identify the phylum and give one example.
  11. Q.3 (viii) (b)
    I live in your small intestine. Pseudocoelom is present in my thread-like body. — Identify the phylum and give one example.
  12. Q.3 (viii) (c)
    My body is spindle shaped. I respire with the help of gills. — Identify my class and give one example.

Q.4

5 marks each · attempt any 1

  1. Answer the following questions based on the human male reproductive system:
    Q.4 (i) (a)5 marks
    In which organ are sperms formed?
  2. Q.4 (i) (b)
    What is the length of a sperm?
  3. Q.4 (i) (c)
    What is the work of the vas deferens?
  4. Q.4 (i) (d)
    By which type of cell division are sperms formed?
  5. Q.4 (i) (e)
    Name any two unpaired organs of the male reproductive system.
  6. Answer the following questions based on environmental conservation and biodiversity:
    Q.4 (ii) (a)5 marks
    Complete the flow chart: Classification of threatened species (into four categories).
  7. Q.4 (ii) (b)
    How can biodiversity be conserved? Give any four points.
  8. Q.4 (ii) (c)
    Complete the flow chart: Colour of the pages in the Red List of Endangered Species (Red List →\rightarrow two colours).