Reproduction Unit Assertion and Reason Questions

The following questions consist of two statements, one labelled as Assertion (A) and the other labelled the Reason (R). Examine these two statements carefully and select the most appropriate answer codes.
A. Assertion and reason both are correct and reason is the correct explanation of Assertion.
B. Assertion and reason both are correct and reason is not the correct explanation of Assertion.
C. Assertion is correct but reason is wrong.
D. Both Assertion and Reason are false.

1. Assertion: Angiospermic flowers perform the function of sexual reproduction.
   Reason: The male and female reproductive structures are found in the flower.
2. Assertion: Nuclear Endosperm is formed by subsequent nuclear division without wall formation.
   Reason: Coconut is an example of such Endosperm, where the Endosperm remains nuclear throughout the development of the fruit.
3. Assertion: Chasmogamous flowers require pollinating agents.
   Reason: Cleistogamous flowers do not expose their sex organs.
4. Assertion: The two cotyledons in seeds are embryonic leaves.
   Reason: The embryo contains radicle and plumule.
5. Assertion: Many plants are propagated vegetatively even though they bear seeds.
   Reason: Potatoes multiply by tubers and apple by cutting.
6. Assertion: Interstitial spaces outside the seminiferous tubule have blood vessels and Sertoli cells.
   Reason: Sertoli cells provide nutrition to the germ cells.
7. Assertion: Clitoris of female is homologous to tips of penis.
   Reason: Both have same origin and richly supplied with nerves and blood vessels.
8. Assertion: Corpus luteum secretes the female hormone progesterone.
   Reason: After ovulation, a ruptured follicle turns into yellowish solid mass of cells called Corpus albicans.
9. Assertion: Corpus luteum contains blood clot and fibrin.
   Reason: Corpus luteum is formed by the germinal epithelium.
10. Assertion: Placenta acts as major endocrine organ.
    Reason: In mammals, female component of the Placenta derive initially from the condroblast.
11. Assertion: Sponge and delfin are chemical methods of contraception.
    Reason: Diaphragms and cervical caps are disposable barrier method of contraception.
12. Assertion: Fetal chromosomal disorder can be diagnosed by chorionic villi sampling.
    Reason: Karyotyping can be done for mitotically dividing cells of chorionic villi.
13. Assertion: Insects visit flowers to collect Honey.
    Reason: Attractive color of flowers prevents the insects from damaging other parts of the plant.
14. Assertion: Meiosis and syngamy are essential in sexual reproduction.
    Reason: Meiosis and syngamy are not essential in asexual reproduction.
15. Assertion: Primary endosperm nucleus (PEN) is generally triploid.
    Reason: PEN is derived by the fusion of haploid male gametes and diploid secondary nucleus.
16. Assertion: Cross- pollination results in healthy and viable offspring.
    Reason: In self- pollination, there is production of weaker progeny.
17. Assertion: Sperm must undergo capacitation in the female reproductive tract before they can fertilize an oocyte.
    Reason: Freshly ejaculated sperm from male are infertile.
18. Assertion: The primary sex organs are the structures that produce gametes.
    Reason: The primary sex organs located within the pelvic cavity and the secondary sex organs are the external genitalia.
19. Assertion: In a normal delivery, blood loss does not exceed 350 ml.
    Reason: The uterine blood vessels are constricted during the placental stage.
20. Assertion: The penetration of a sperm cell through the Corona radiata and the zona pellucida of an ovulated secondary oocyte are necessary for fertilization to occur.
    Reason: Sperm cell penetrates through the corona radiata and the zona pellucida, after the second meiotic division.
21. Assertion: Menopause marks the termination of both menstruation and ovulation.
    Reason: Menopause, the end of menstruation and ovulation, generally occurs after about age 50.
22. Assertion: It is not necessary that breasts be large in order to nurse an infant.
    Reason: Breast size does not affect the ability of a woman to nurse breastfeed.
23. Assertion: An ectopic pregnancy is an implantation of the blastocyst in a site other than uterus.
    Reason: In this, the blastocyst most often implants in the uterine tube.
24. Assertion: An acrosomal reaction must take place before a sperm can fertilize a secondary oocyte.
    Reason: Acrosome at the head of sperm is derived from mitochondrion od spermatid.
25. Assertion: The mammary glands secretes milk for the nourishment of the young.
    Reason: These are modified sweat glands.
26. Assertion: The dilation stage of labour is usually the longest stage.
    Reason: It may last from one to several days.
27. Assertion: Women are at the peak of conception on the 14th day of menstrual cycle.
    Reason: Vasectomy is the method normally, employed to avoid conception in females.
28. Assertion: ‘Saheli’ is the world’s first non-steroidal oral contraceptive pill.
    Reason: It has been developed by National Institute of Immunology, New Delhi.
29. Assertion: Sterilization procedure in the mail is called Vasectomy.
    Reason: In this epididymis is removed preventing sperm maturity and motility.
30. Assertion: Fertility drugs can be wonderful to those who cannot conceive.
    Reason: Multiple birth is a real side effect to the drugs.

Answer Sheet:

1. A
2. C
3. B
4. B
5. A
6. A
7. A
8. C
9. C
10. C
11. C
12. A
13. C
14. B
15. A
16. B
17. A
18. C
19. A
20. C
21. B
22. A
23. B
24. C
25. B
26. C
27. C
28. C
29. C
30. B