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SECTION–A:

problem 1: Name the kind of root modification found in Cuscuta. What is its function?

problem 2: Draw a neat diagram of anaphase phase of mitosis in an animal cell.

problem 3: A person has swelling on the front of his neck. Name the disease he is suffering from and the cause of it.

problem 4: A person suffered from smallpox at the age of 10 years and after that he never had it throughout his lifetime. Which kind of immunity the person has developed?

problem 5: Define the term ‘ecosystem’. What are the main components of an ecosystem?

problem 6: Draw a simple diagram to illustrate circulatory system of cockroach and label any three of the given parts:

Heart; dorsal sinus; perivisceral sinus; perineural sinus

problem 7: When the stem of an herbaceous plant is cut few inches above its base with a sharp knife, water is seen oozing out from the cut end. Name the phenomenon. Why does it occur?

problem 8: Assume a plant in your garden is not growing in height. Name the plant hormone which can be employed to solve this problem. Mention other function of this hormone in plants.

problem 9: Why is genetic code stated to be degenerate in nature?

problem 10: Why should we conserve natural resources? Provide two points.

problem 11: List any four manners by which AIDS is transmitted.

problem 12: Define the term ‘tissue’. Mention two structural features of epithelial tissue of an animal. Which group of epithelial tissue is found in the lining of kidney tubules? Mention its function in the kidney.

problem 13: Draw a neat diagram showing microscopic structure of testis of man and label the given:

a) Seminiferous tubule.
b) Vasa efferentia.
c) Rete testis.
d) Testicular lobe.

problem 14: Two men claimed paternity of a two-month-old baby. Propose the modern genetic method which can be used to identify the real father of the baby.

Enumerate this method in three steps.

problem 15: Propose three ways by which people working in nuclear establishments can be protected against nuclear radiation. Why are nuclear wastes disposed in the lead containers?

problem 16: How is the level of hormone in man maintained via feedback mechanism? Describe briefly by giving an appropriate ex.

problem 17: What are transgenics? How transgenic plants are produced using Agrobacterium tumefaciens? describe in brief.
problem 18: Briefly describe the fluid mosaic model of plasma membrane. How does transport of small molecules occur across it? Describe any two.

problem 19: What are the two criteria for an element to be necessary for a plant? State two functions each of magnesium and phosphorous.

problem 20: Using punnet square, work out a dihybrid cross between homozygous round yellow and wrinkled green seed varieties of a pea plant. Identify the Mendelian principle which the F2 phenotypic ratio refers to.

problem 21: Desribe the role of the given in the digestion of food in human body:

a) Succus entericus.
b) Hydrochloric acid.

SECTION–B

problem 22: Name two plants used for keeping in the aquarium?

problem 23: Give the scientific name of fruit fly.

problem 24: Your teacher has asked you to collect amoeba for an experiment. How will you culture it in the laboratory?

problem 25: What is a preservative? State the composition of Bouin’s fluid.

problem 26:

a) State any three differences between a simple microscope and a compound microscope.
b) How are the plants specimens dried and preserved for preparing herbarium?

Biology, Academics

  • Category:- Biology
  • Reference No.:- M9705

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