Download App

Human Health and Disease — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Health and Disease1 Mark
MCQ
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.
Assertion : Subsequent encounter with the same pathogen elicits a highly intensified anamnestic response.
Reason: This is based on the fact that our body appears to have memory of the first encounter.
  • ✓
    Both assertion and reason are true, and reason is the correct explanation of assertion.
  • B
    Both assertion and reason are true, but reason is not the correct explanation of assertion.
  • C
    Assertion is true, but reason is false.
  • D
    Both assertion and reason are false.
✓

Answer

Correct option: A.
Both assertion and reason are true, and reason is the correct explanation of assertion.
Both assertion and reason are true, and reason is the correct explanation of assertion.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Assertion (A) & Reason (B) MCQ" from Human Health and Disease→Human Health and Disease — all question types→BIOLOGY STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Read the following and answer any four questions from $(i)$ to $(v)$ given below:
Many adaptations are found in flowers to achieve certain kind of pollination. The pollination achieved by insects is known as entomophily. The given diagram shows the cross-section of an anther of an insect pollinated flower.
  1. Which of the following is/ are the function $(s)$ of structure $Y$?
  1. To carry waste products away from the anther.
  2. To supply oxygen to the cells of the anther.
  3. To transport food and mineral salts to the anther.
  4. To supply water to the anther.
  1. Conly.
  2. $C$ and $D$ only.
  3. $A, B$ and $D$ only.
  4. $A, B, C$ and $D$.
  1. Which of the following most accurately describes the structures found in compartment $X$?
  1. They contain two haploid nuclei resulting from meiosis.
  2. They contain two haploid nuclei resulting from mitosis.
  3. They contain two haploid male gametes, resulting from mitosis.
  4. They contain a vegetative nucleus and pollen tube nucleus.
  1. Which of the following is a distinctive characteristic of insect $-$ pollinated flower?
  1. All of them have nectar guides on their flowers.
  2. They produce sugary fruit.
  3. Their pollen grains tend to have rough surfaces.
  4. They produce abundant quantities of pollen to make up for pollen grains that might be removed by the wind.
  1. Which of the following are likely characteristics of the structures found in $X$ and stamens of this plant?
S. No
Structure of $X$
Stamens
$(a)$
Abundant and light
Pendulous
$(b)$
Rough surfaces
Non $-$ pendulous
$(c)$
Light and sticky
Pendulous
$(d)$
Coarse and sticky
Protrude outside the flower
  1. Spiny or sticky pollen grains and large, attractively coloured flowers are associated with :
  1. Hydrophily.
  2. Entomophily.
  3. Ornithophily.
  4. Anemophily.
→
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.
Assertion : $\text{SCID}$ is the first genetic disorder to be combated with gene therapy.
Reason : $\text{SCID}$ is a type of allergy.
→
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.
Assertion: Maximum biodiversity occurs in temperate areas.
Reason: Temperate areas have favourable conditions for speciation and for supporting variety and number of organisms.
→
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.
Assertion : Cornea is considered as an immunologically privileged site
Reason: A transplanted cornea is rarely rejected.
→
Mention the name of two common diseases that can be treated by medicines that contain biological products of transgenic animals.
→
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.
Assertion: An organism which acts as herbicide is called bioherbicide.
Reason: Phytophthora palmivora is a mycoherbicide.
→
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.
Assertion: Selectable marker is meant for distinguishing a recombinant from non$-$recombinant.
Reason: Every recombinant can flourish in medium having both ampicillin and tetracycline, while the non- recombinants cannot.
→
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.
Assertion : Allergy is an immunity disorder.
Reason: Allergy is confined to a person only.
→
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.
Assertion : A gene may have several allelomorphs.
Reason: Wild form can mutate in more than one ways.
→
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.
Assertion: Megaspore mother cell undergoes meiotic division.
Reason: All four megaspores form female gametophyte.
→