MCQ
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.
  • A
    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. Assertion: Periodic abstinence is a natural method where couples abstain from coitus. Reason: Coitus from day 5-lO should be avoided because this is the time of ovulation.

Answer

  1. Assertion is true, but reason is false.

Explanation:

Periodic abstinence is a natural method of birth control in which the couples avoid or abstain from coitus (copulation or intercourse) from day 10 to 17 of the menstrual cycle because ovulation can occur during this period. The chances of fertilisation are very high during this period, therefore, it is called the fertile period.

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

Similar questions

Consider the following four statements $(A-D)$ and select the correct option stating which ones are true $(T)$ and
which ones are false $(F)$.
Statements :
$(A)$ Vertical distribution of different species occupying different levels in a community is called stratification.
$(B)$ Net primary productivity minus respiration losses is the gross primary productivity.
$(C)$ Rate of biomass production is called decomposition
$(D)$ Annual net primary productivity of oceans is $55$ billion tons
(A) (B) (C) (D)
Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogentc action$?$

$(a)$ Darwin's Finches of Galapagos islands.

$(b)$ Herbicide resistant weeds.

$(c)$ Drug resistant eukaryotes.

$(d)$ Man$-$created breeds of domesticated animals like dogs.

Maximum biomass and variable organisms are found in:
Identify the disease on basis of following characters.

$(1)$ Short statured with small round head.

$(2)$ Furrowed tongue and partially open month.

$(3)$ Palm is broad with characteristic palm crease.

Choose the correct statement.
The net electric charge on DNA and histones is:
Key point to Lamarck's view about organic evolution is that every offspring
Which one of the following pairs is correctly matched with regard to the codon and the amino acid coded by it ?
Read the following statements and choose the set of correct statements:

$(a)$ Euchromatin is loosely packed chromatin

$(b)$ Heterochromatin is transcriptionally active

$(c)$ Histone octomer is wrapped by negatively charged DNA in nucleosome

$(d)$ Histones are rich in lysine and arginine

$(e)$ A typical nucleosome contains $400\,bp$ of DNA helix

Choose the correct answer from the options given below:

Which is an auto immune disease