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Bihar Board Class 12 (Science) Reproduction in Organisms & Plants — practice questions — page 3

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 61–90 of 143.

Reading the mechanisms backRead the answer and worked solution →True or false: evidence for evolutionRead the answer and worked solution →Chance or selection?Read the answer and worked solution →OriginsRead the answer and worked solution →Flip and pair: process with driverRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →Assertion and reason: mechanismsRead the answer and worked solution →Two true, one falseRead the answer and worked solution →Tap every statement the chapter supportsRead the answer and worked solution →Complete the role of variationRead 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 →Flip and pair: term with meaningRead the answer and worked solution →Reading the termsRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →Microsporogenesis (pollen formation) is initiated when:Read the answer and worked solution →Parthenocarpy refers to:Read the answer and worked solution →Pollination is best defined as the transfer of pollen from:Read the answer and worked solution →Pollination by INSECTS is called:Read the answer and worked solution →In the fruit, the OVARY WALL develops into the:Read the answer and worked solution →The female reproductive whorl of a flower is theRead the answer and worked solution →Pollination of grasses occurs mainly throughRead the answer and worked solution →Self-incompatibility is a mechanism that preventsRead the answer and worked solution →Double fertilisation in angiosperms producesRead the answer and worked solution →In a typical dicot embryo, the number of cotyledons is:Read the answer and worked solution →The 2021 amendment to the MTP Act extended the upper time-limit for pregnancy termination (for vulnerable categories) from 20 to:Read the answer and worked solution →Which process is this?Read the answer and worked solution →Two are true, one is notRead the answer and worked solution →Tap every factor the chapter says can lead to new speciesRead the answer and worked solution →Reading the mechanisms backRead the answer and worked solution →

Worked practice questions

Reading the mechanisms back

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Questions
  1. Question
    Variation leads to variable
    Choices
    1. fitness
    2. habitat
    3. climate
    Correct choice
    fitness
  2. Question
    Which process is driven by chance?
    Choices
    1. natural selection
    2. genetic drift
    3. homology
    Correct choice
    genetic drift
  3. Question
    Which is Darwin's mechanism?
    Choices
    1. genetic drift
    2. fragmentation
    3. natural selection
    Correct choice
    natural selection
Straight recall. Source: syllabus Biology, Evolution.

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True or false: evidence for evolution

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Questions
  1. Statement is true
    Yes
    Statement
    Homology is accounted for by common ancestry.
  2. Statement is true
    Yes
    Statement
    Diversity has changed over millions of years.
  3. Statement is true
    No
    Statement
    Evolution acts on individuals, not populations.
  4. Statement is true
    Yes
    Statement
    Variation exists within a population.
  5. Statement is true
    Yes
    Statement
    Fitness can vary between members of a population.
Homology is the chapter's named line of evidence. Source: syllabus Biology, Evolution.

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Chance or selection?

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Items
  1. Item
    Genetic drift
    Category
    Driven by chance
  2. Item
    Random change in a small population
    Category
    Driven by chance
  3. Item
    Natural selection
    Category
    Driven by fitness
  4. Item
    Differential survival and reproduction
    Category
    Driven by fitness
Categories
  1. Item
    Driven by chance
  2. Item
    Driven by fitness
Drift is chance; selection is fitness. Source: syllabus Biology, Evolution.

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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