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12th Standard
Biology
3 Marks
What is ovoviviparous condition?
Describe pedal laceration.
(i) Identify the Process
(ii) Name the Organism
What is Incomplete parthenogenesis? Explain with example.
Write a short note on phases of life cycle.
What is the role of FSH & LH in spermatogenesis?
What is LH surge?
In the diagram given below.
(a) Label the parts and
(b) Identify the name of the diagram.
In the diagram given below.
(a) Identify the diagram
(b) Label the parts
What are primary reproductive organs? What role does they play in organisms?
Write any three statements on Sertoli cells
Menstrual hygiene is essential for women. Why?
Explain gastrulation.
Explain Foetal-ejection reflex
What is ZIFT?
What is GIFT?
What are the causes of infertility in human beings?
How will you detect the foetal disorders, during the early stages of pregnancy?
Name anyone
(a) fungal STI
(b) Bacterial STI
(c) Protozoan STI
Name the most effective long-acting reversible contraceptive methods.
What is Pedigree analysis?
Draw the symbols for
(a) Mating (b) Dizygotic twins.
Role of Y- chromosome is crucial for maleness - Justify.
What is Sewall Wright effect or Genetic drift?
Identify the mismatched pair and give reason.
(a) Plague Yersinia pestis
(b) Filariasis Wuchereria bancrofti
(c) Dermatomycosis Trypanosoma gambiense
(d) Common cold Rhino virus
