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Test: Population Explosion & Birth Control (NCERT) - NEET MCQ


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25 Questions MCQ Test Biology Class 12 - Test: Population Explosion & Birth Control (NCERT)

Test: Population Explosion & Birth Control (NCERT) for NEET 2024 is part of Biology Class 12 preparation. The Test: Population Explosion & Birth Control (NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Population Explosion & Birth Control (NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Population Explosion & Birth Control (NCERT) below.
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Test: Population Explosion & Birth Control (NCERT) - Question 1

Read the given statements and select the correct option.
Statement 1: Physiological capacity of organisms to produce off spring under natural conditions is called as reproductive potential
Statement 2: Minimum number of individuals which an environment can sustain is referred to as its carrying capacity

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 1

Maximum number of individuals which an environment can sustain is referred to as its carrying capacity

Test: Population Explosion & Birth Control (NCERT) - Question 2

What is the figure given below showing in particular?

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 2

Tubectomy is a permanent contraception method. It is a surgical method carried out in females in which a small part of the Fallopian tube is removed or tied up through a small cut in the abdomen or through vagina. It prevents the transport of gametes.

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Test: Population Explosion & Birth Control (NCERT) - Question 3

Read the given statements and select the correct option.
Statement 1:
Diaphragms, cervical caps and vaults are made of rubber and are inserted into the female reproductive tract to cover the cervix before coitus.
Statement 2: They are chemical barriers of conception and are reusable.

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 3

Diaphragms, cervical caps and vaults are physical barriers of conception which are reusable.

Test: Population Explosion & Birth Control (NCERT) - Question 4

Choose the correct answer among the alternatives given :
Which of the following contraceptive methods correctly matches with its mode of action?

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 4

Tubectomy - Blocks gamete transport
Oral pills - Inhibit ovulation and implantation
Diaphragms - Prevent sperm from reaching an ovum
IUDs - Increase phagocytosis of sperms within the uterus

Test: Population Explosion & Birth Control (NCERT) - Question 5

CuT is an intrauterine contraceptive device. Select the option that correctly defines the role of Cu

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 5

IUDs increase phagocytosis of sperms within the uterus and Cu ions released suppress sperm motility and the fertilizing capacity of sperms. The hormone releasing IUDs makes the uterus unsuitable for implantation and the cervix hostile tn the sperms. lUDs are ideal contraceptives for females.

Test: Population Explosion & Birth Control (NCERT) - Question 6

Which of the following statements about Intra Uterine Devices (IUDs) is correct?

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 6

Correct Answer: Copper ions released by IUDs suppress sperm motility and fertilizing capacity.

Test: Population Explosion & Birth Control (NCERT) - Question 7

Which of the following are the reasons for population explosion?
(i) Increased health facilities
(ii) Rapid increase in MMR
(iii) Rapid increase in IMR
(iv) Rapid decrease in MMR
(v) Decrease in number of people reaching reproductive age

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 7

Rapid increase in population over a relatively short period of time is called population explosion. Reasons for population explosion are increased health facilities, decrease in MMR (maternal mortality rate), and IMR (infant mortality rate) and increase in number of people reaching reproductive age.

Test: Population Explosion & Birth Control (NCERT) - Question 8

Fill up the blanks in the following paragraph by selecting the correct option.
A. ______(i) methods work on the principle of avoiding chances of ovum and sperms meeting.
B. ______(ii) is one such method in which the couples avoid coitus from day 10 to 17 of the menstrual cycle.
C. ______(iii) is another method in which the male partner withdraws his penis from the vagina just before ejaculation so as to avoid insemination.
D. ______(iv) method is based on the fact that ovulation and therefore the cycle do not occur during the period of intense lactation following parturition.

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 8
Explanation:

  • Option A: Incorrect. LUDs are not mentioned in the paragraph.

  • Option B: Incorrect. Lactational amenorrhea is not a method mentioned in the paragraph.

  • Option C: Correct. The methods mentioned in the paragraph are barrier methods, periodic abstinence, coitus interruptus, and lactational amenorrhea.

  • Option D: Incorrect. Surgical methods are not mentioned in the paragraph.

Test: Population Explosion & Birth Control (NCERT) - Question 9

Which of the following contraceptive methods has poor reversibility?

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 9

Figure (c) is of vasectomy which is a surgical contraception method performed in males. In vasectomy, a small part of the vas deferens is removed or tied up through a small cut on the scrotum. This prevents sperm transport. Vasectomy has a poor reversibility. There is no effect on libids and erectile functioning.

Test: Population Explosion & Birth Control (NCERT) - Question 10

Which of the following is not a characteristic of an ideal contraceptive?

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 10

An ideal contraceptive should be user-friendly, easily available, effective and reversible with no or least side-effects.

Test: Population Explosion & Birth Control (NCERT) - Question 11

How do the pills work?
(i) Inhibit ovulation and implantation
(ii) Alter the quality of cervical mucus to prevent or retard the entry of sperms
(iii) Prevent the ejaculated semen from entering the female vagina
(iv) Inhibit spermatogenesis

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 11

Small doses of either progestogens or progesterone-estrogen combinations are used in the form of tablets by females called oral pills. Pills inhibit ovulation and implantation as well as alter the quality of cervical mucus to prevent or retard entry of sperms inside female genital tract.

Test: Population Explosion & Birth Control (NCERT) - Question 12

IUDs prevent pregnancy by

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 12

Copper-releasing lUDs (CuT, multiload 375) increase phagocytosis of sperms within the Uterus and the Cu ions released suppress sperm motility and the fertilizing capacity of sperms. The hormone-releasing IUDs (progestasert, LNG-20), make the uterus unsuitable for implantation and the cervix hostile to the sperms. IUDs are inserted by trained doctors and they are ideal contraceptives for the females.

Test: Population Explosion & Birth Control (NCERT) - Question 13

Progesterone pill helps in preventing pregnancy by not allowing

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 13

Progesterone pills inhibit follicular development and thus ova formation.

Test: Population Explosion & Birth Control (NCERT) - Question 14

On which of the following facts does the method of periodic abstinence is based?

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 14

Periodic abstinence is a method of contraception in which the couples avoid intercourse from day 10 to 17 of the menstrual cycle because ovulation can occur during this period.

Test: Population Explosion & Birth Control (NCERT) - Question 15

Which of the following contraceptives are implanted under the skin?

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 15

Figure (d) is of hormone implants. These are six matchstick-sized capsules containing synthetic progesterone which are implanted subcutaneously under the skin of the inner arm above the elbow. The capsules slowly release the progesterone for about five years. This blocks ovulation (by inhibiting the release of FSH and LH from pituitary) and thickens the cervical mucus to prevent sperm transport.

Test: Population Explosion & Birth Control (NCERT) - Question 16

Which of the following statements are correct regarding surgical methods of contraception?
(i) These are generally advised to the male/female partner as a terminal method to prevent any more pregnancies.
(ii) Surgical procedure in male is called tubectomy and that in the female,vasectomy.
(iii) Reversibility is easily possible.
(iv) They block gamete transport and thereby prevent conception.

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 16

Surgical (sterilisation) methods of contraception prevent pregnancy by blocking gamete transport and hence their fertilisation. Surgical method in male is called vasectomy and in female, it is called tubectomy. Both methods are very effective but their reversibility is very poor. They are generally regarded as terminal methods to prevent any more pregnancies.

Test: Population Explosion & Birth Control (NCERT) - Question 17

The best way to decrease population of a country is

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 17

Practising and implementing family planning by adopting various contraceptive methods, is one of the best ways to decrease the population of a country.

Test: Population Explosion & Birth Control (NCERT) - Question 18

Read the given statement and select the correct option
Statement 1: Saheli is an pill which has high contraceptive value and very little side effects
Statement 2: It contains progestin with no estrogen, and a non-steroidal preparation called centchroman.

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 18

Saheli is an oral pill that contains a non-steroidal preparation called centchroman. It is taken once a week after an initial intake of twice a week dose for 3 months. It hs high contraceptive value with very little side effects. It has been developed at Central Drug Research Institude, Lacknow.

Test: Population Explosion & Birth Control (NCERT) - Question 19

Multiload device contains

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 19

Multiload is a copper containing intrauterine device which prevents conception

Test: Population Explosion & Birth Control (NCERT) - Question 20

What is true for lactational amenorrhea?
(i) It means absence of menstruation.
(ii) Ovulation does not occur during the lactational period.
(iii) Chances of contraception are almost nil upto six months following parturition.
(iv) Side effects are almost nil
(v) Contraceptive efficiency reduces after the period of intense lactation.
(vi) It is a natural method of contraception.
(vii) It increases phagocytosis of sperms.

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 20

Lactational amenorrhea (absence of menstruation) method is based on the fact that ovulation and therefore the cycle do not occur during the period of intense lactation following parturition. Therefore, as long as the mother breastfeeds the child fully, chances of conception are almost nil. However, this method has been reported to be effective only upto a maximum period of six months following parturition. As no medicines or devices are used in these methods, side effects are almost nil.

Test: Population Explosion & Birth Control (NCERT) - Question 21

The accompanying diagram shows the uterine tubes of four women (P, Q, R and S). In which two women is fertilisation impossible at present?

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 21

Figure R is showing complete blockage of Fallopian tubes and figure S is showing tubectomy which is a surgical method of contraception in females. When both the Fallopian tubes are blocked or cut and tied, there will be no transport of gametes and thus no fertilisation.

Test: Population Explosion & Birth Control (NCERT) - Question 22

Read the given statements and select the correct option
Statement 1: The world population was around 2 billions in 1900 which has rocketed to about 6 billions by 2000
Statement 2: Increase in longevity due to decline in death rate, maternal mortality rate and infant mortality rate has been some major causes of population explosion.

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 22

With the advent of better medicinal technologies and health care almost most of the diseases can be cured.
The death rate, maternal mortality rate and infant mortality has decreased and have led to increased longevity and increase in population.
This has led to Population explosion.

Test: Population Explosion & Birth Control (NCERT) - Question 23

The birth control device used by women is /are

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 23

Diaphragm and Copper Tare used by women. Condon are oenerallv used by males although female condom are called femidoms are also available.

Test: Population Explosion & Birth Control (NCERT) - Question 24

Match column I with column II and select the correct option from the given codes.

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 24

With reference to the following table, 

Test: Population Explosion & Birth Control (NCERT) - Question 25

Read the following statements and select the option having both incorrect statements.
(i) Condoms decrease sperm motility.
(ii) Diaphragms, cervical caps and vaults are for both males and females.
(iii) IUDs are inserted by-expert nurses.
(iv) Sterilisation is a terminal method to prevent further pregnancy.

Detailed Solution for Test: Population Explosion & Birth Control (NCERT) - Question 25

Condom, made of thin rubber or latex, is used to cover the penis in the male just before coitus so that the ejaculated semen (sperms) do not enter into the female reproductive tract. Diaphragms, cervical caps, and vaults are also made of rubber and are inserted into the female reproductive tract to cover the cervix during coitus. They prevent conception by blocking the entry of sperms through the cervix.

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