Question
For question, two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.

  1. Both assertion and reason are true, and reason is the correct explanation of assertion.
  2. Both assertion and reason are true, but reason is not the correct explanation of assertion.
  3. Assertion is true, but reason is false.
  4. Both assertion and reason are false.
Assertion : Streptococcus pneumoniae and Haemophilus influenzae are responsible for causing infectious disease in human beings.

Reason: A healthy person acquires the infection by inhaling the droplets/aerosols released by an infected person.

Answer

  1. Both assertion and reason are true, but reason is not the correct explanation of assertion.

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For two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.
  1. Both assertion and reason are true, and reason is the correct explanation of assertion.
  2. Both assertion and reason are true, but reason is not the correct explanation of assertion.
  3. Assertion is true, but reason is false.
  4. Both assertion and reason are false.
Assertion: Clitoris of female is homologous to tip of penis.
Reason: Both have same origin and richly supplied with nerves and blood vessels.
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  1. Both assertion and reason are true, and reason is the correct explanation of assertion.
  2. Both assertion and reason are true, but reason is not the correct explanation of assertion.
  3. Assertion is true, but reason is false.
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Assertion: Pollen grains of many insect pollinated species are sticky.
Reason: In the anemophilous flower, the pollen grains are powdery and non-sticky.
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  2. Both assertion and reason are true, but reason is not the correct explanation of assertion.
  3. Assertion is true, but reason is false.
  4. Both assertion and reason are false.
Assertion: The egg apparatus, consists of two synergids and one egg cell.
Reason: Filiform apparatus play an important role in guiding the pollen tubes into the synergids.
For question two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.
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  2. Both assertion and reason are true but reason is not the correct explanation of assertion.
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Assertion: Predation and parasitism are considered to be negative interactions.
Reason: Predators and parasites limit the population of their host species.
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  2. Both assertion and reason are true, but reason is not the correct explanation of assertion.
  3. Assertion is true, but reason is false.
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Assertion: Mostly in a tetrad, all microspores are free.
Reason: Compound pollen grain and pollinium are formed by grouping of microspores.
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  1. Both assertion and reason are true, and reason is the correct explanation of assertion.
  2. Both assertion and reason are true, but reason is not the correct explanation of assertion.
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Assertion: Lactose in lac operon is promoter gene.
Reason: Lactose inactivates the repressor gene.
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  2. Both assertion and reason are true but reason is not the correct explanation of assertion.
  3. Assertion is true but reason is false.
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Assertion: The soil profiles of grassland, forest and desert biomes differ from each other.
Reason: Soil profile develops due to weathering process, accumulation of organic matter and leaching of mineral matter.
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Assertion: In human male, testis are extra abdominal and lie in scrotal sacs.
Reason: Scrotum acts as thermoregulator and keeps testicular temperature lower by 2ºC for normal spermatogenesis.
For question two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.
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Assertion: Pure lines are called true breed.
Reason: True breeds are used for cross breeding.
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  1. Both assertion and reason are true, and reason is the correct explanation of assertion.
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Assertion : A cholera patient is given glucose, electrolytes, and water.
Reason: These plasmolyse the disease causing germs.