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Bihar Board Class 12 (Science) Reproduction in Organisms & Plants — practice questions — page 4

Explore 143 free Reproduction in Organisms & Plants questions in Bihar Board Class 12 (Science) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Reproduction in Organisms & Plants questions and exercises with answers

Showing questions 91–120 of 143.

Assertion and reason: mechanismsRead the answer and worked solution →Tap every statement the chapter supportsRead the answer and worked solution →The Reproductive and Child Health (RCH) programme replaced India's earlier Family Planning Programme in:Read the answer and worked solution →The legal minimum age of marriage in India for males and females respectively is:Read the answer and worked solution →Chance or selection?Read the answer and worked solution →Tubectomy is a surgical sterilisation procedure performed on:Read the answer and worked solution →Assertion and reasonRead the answer and worked solution →Complete the chain from chemistry to lifeRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →True or false: how new species appearRead the answer and worked solution →Darwin and selectionRead the answer and worked solution →Complete the role of variationRead the answer and worked solution →True or false: variation and fitnessRead the answer and worked solution →NEET · Biology · Flower Parts ↔ FunctionRead the answer and worked solution →Typical duration of human pregnancy is approximatelyRead the answer and worked solution →A single primary oocyte produces how many functional egg cells after meiosis?Read the answer and worked solution →Fertilisation in humans typically occurs in:Read the answer and worked solution →The average length of the human menstrual cycle is:Read the answer and worked solution →The LH SURGE triggers which key event in the menstrual cycle?Read the answer and worked solution →The temperature of the testis is maintained at:Read the answer and worked solution →Fertilisation typically occurs in the:Read the answer and worked solution →Parturition is triggered by which hormone?Read the answer and worked solution →True or false: human reproductionRead the answer and worked solution →Male or female structure?Read the answer and worked solution →Reading the termsRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →Colostrum (the first milk after childbirth) is rich in:Read the answer and worked solution →LH surge in the menstrual cycle triggers:Read the answer and worked solution →A single spermatogonium ultimately produces how many functional sperm cells?Read the answer and worked solution →The first milk produced after birth, rich in antibodies, is calledRead the answer and worked solution →

Worked practice questions

Assertion and reason: mechanisms

Read exercise and reference answers
Questions
  1. Reason
    It works through changes in the distribution of variation across a group.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    Evolution is a property of populations, not individuals.
  2. Reason
    Fragmented populations diverge without interbreeding to average them out.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    Isolation can speed the appearance of new species.
  3. Reason
    Drift changes a population by chance.
    Verdict
    The assertion is false and the reason is true.
    Assertion
    Genetic drift favours the fittest.
The reason must genuinely explain the assertion. Source: syllabus Biology, Evolution.

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Tap every statement the chapter supports

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Questions
  1. Items
    1. Text
      Variation leads to variable fitness
      Matches the category
      Yes
    2. Text
      Drift and fragmentation accentuate variation
      Matches the category
      Yes
    3. Text
      New species can appear
      Matches the category
      Yes
    4. Text
      Species are unchanging
      Matches the category
      No
    5. Text
      Evolution acts on single individuals
      Matches the category
      No
    Category
    Supported by this chapter
What it actually claims. Source: syllabus Biology, Evolution.

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The Reproductive and Child Health (RCH) programme replaced India's earlier Family Planning Programme in:

  1. $1990$
  2. $1996$
  3. $2002$
  4. $2010$
Show answer and solution

Correct answer: B. $1996$

India's family planning programme (started 1951) was renamed to Reproductive and Child Health (RCH) Programme in 1996, broadening focus to holistic reproductive health.

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More Biology topics

Biotechnology and ApplicationsGenetics and EvolutionBiology in Human Welfare & HealthSexual Reproduction in Flowering PlantsMolecular Basis of InheritancePrinciples of Inheritance and VariationHuman Health and DiseaseEvolution