Question 1:
Match the following items of Column-I with that of Column-II:
Column-I: (a) Trophoblast, (b) Implantation, (c) Inner cell mass, (d) Morula.
Column-II: (i) Embedding of blastocyst in the endometrium, (ii) Group of cells that would differentiate as embryo, (iii) Embryo with $8-16$ blastomeres, (iv) Outer layer of blastocyst.
Choose the option that matches Column-I with Column-II correctly.
Question 2:
The number of autosomes present in a human secondary spermatocyte
Question 3:
Given below are a few statements with respect to spermatogenesis in a human male.
(i) Sperms are released from the seminiferous tubules by the process of spermiation.
(ii) Spermiogenesis involves the maturation of spermatids into sperms.
(iii) Spermatogonia produce spermatids by the process of spermiogenesis.
(iv) Meiosis II in secondary spermatocytes results in the formation of four equal haploid spermatids.
(v) Primary spermatocyte completes the first meiotic division forming two equal, diploid cells called secondary spermatocytes.
Choose the option with all true statements from the given options :
(i) Sperms are released from the seminiferous tubules by the process of spermiation.
(ii) Spermiogenesis involves the maturation of spermatids into sperms.
(iii) Spermatogonia produce spermatids by the process of spermiogenesis.
(iv) Meiosis II in secondary spermatocytes results in the formation of four equal haploid spermatids.
(v) Primary spermatocyte completes the first meiotic division forming two equal, diploid cells called secondary spermatocytes.
Choose the option with all true statements from the given options :
Question 4:
Given below are few statements with reference to the uterus in the female reproductive system:
(i) The myometrium exhibits strong contractions during the delivery of the baby.
(ii) The uterus opens into the cervix through a narrow opening called vagina.
(iii) The cavity of the cervix and the vagina forms the birth canal.
(iv) The outermost layer of uterus is a thin membranous perimetrium.
(v) The uterus is supported by tendons attached to the pelvic wall.
Choose the option with all true statements from the given options:
(i) The myometrium exhibits strong contractions during the delivery of the baby.
(ii) The uterus opens into the cervix through a narrow opening called vagina.
(iii) The cavity of the cervix and the vagina forms the birth canal.
(iv) The outermost layer of uterus is a thin membranous perimetrium.
(v) The uterus is supported by tendons attached to the pelvic wall.
Choose the option with all true statements from the given options:
Question 5:
Given below are few statements with reference to the uterus in the female reproductive system:
(i) The myometrium exhibits strong contractions during the delivery of the baby.
(ii) The uterus opens into the cervix through a narrow opening called vagina.
(iii) The cavity of the cervix and the vagina forms the birth canal.
(iv) The outermost layer of uterus is a thin membranous perimetrium.
(v) The uterus is supported by tendons attached to the pelvic wall.
Choose the option with all true statements from the given options:
(i) The myometrium exhibits strong contractions during the delivery of the baby.
(ii) The uterus opens into the cervix through a narrow opening called vagina.
(iii) The cavity of the cervix and the vagina forms the birth canal.
(iv) The outermost layer of uterus is a thin membranous perimetrium.
(v) The uterus is supported by tendons attached to the pelvic wall.
Choose the option with all true statements from the given options:
Question 6:
Given below are few statements with reference to the uterus in the female reproductive system:
(i) The myometrium exhibits strong contractions during the delivery of the baby.
(ii) The uterus opens into the cervix through a narrow opening called vagina.
(iii) The cavity of the cervix and the vagina forms the birth canal.
(iv) The outermost layer of uterus is a thin membranous perimetrium.
(v) The uterus is supported by tendons attached to the pelvic wall.
Choose the option with all true statements from the given options:
(i) The myometrium exhibits strong contractions during the delivery of the baby.
(ii) The uterus opens into the cervix through a narrow opening called vagina.
(iii) The cavity of the cervix and the vagina forms the birth canal.
(iv) The outermost layer of uterus is a thin membranous perimetrium.
(v) The uterus is supported by tendons attached to the pelvic wall.
Choose the option with all true statements from the given options:
Question 7:
Given below are a few statements with reference to the accessory ducts of the human male reproductive system:
(i) The seminiferous tubules of the testes open into rete testis then into the vas deferens.
(ii) The vasa efferentia leave the testes and open into the epididymis.
(iii) The epididymis leads to vas deferens that ascends into the abdomen.
(iv) The vas deferens receives a duct from the prostrate gland and opens into the urethra as ejaculatory duct.
(v) The urethra originates from the urinary bladder and extends through the penis to its external opening, urethral meatus.
Choose the option with all true statements from the given options :
(i) The seminiferous tubules of the testes open into rete testis then into the vas deferens.
(ii) The vasa efferentia leave the testes and open into the epididymis.
(iii) The epididymis leads to vas deferens that ascends into the abdomen.
(iv) The vas deferens receives a duct from the prostrate gland and opens into the urethra as ejaculatory duct.
(v) The urethra originates from the urinary bladder and extends through the penis to its external opening, urethral meatus.
Choose the option with all true statements from the given options :
Question 8:
Assertion (A): Corpus luteum secretes the hormone, progesterone.
Reason (R) : Hormone Progesterone is essential for maintenance of the endometrium.
Reason (R) : Hormone Progesterone is essential for maintenance of the endometrium.
Question 9:
(a) "A fully developed foetus initiates its delivery from the mother's womb." Explain.
OR
(b) Give reasons for the following:
OR
(b) Give reasons for the following:
- (i) Why can a woman generally not conceive a child after 50 years of age?
- (ii) Polar bodies are formed during oogenesis and not during spermatogenesis.
Question 10:
- (a) Name and explain the role of inner and middle walls of the human female uterus.
- (b) Write the location and function of fimbriae in human female.
Question 11:
Explain the process of formation of placenta in a human female after the implantation of the blastocyst in the endometrium of the uterus.
Question 12:
OR (B) Given below is the diagram of human ovum surrounded by a few sperms. Observe the diagram and answer the questions that follows: [Diagram].
(i) Compare the fate of sperms 'P', 'Q' and 'R' shown in the diagram.
(ii) Write the role of Zona pellucida in this process.
(iii) Analyse the changes occurring in the ovum after the entry of sperm.
(iv) How acrosome and middle piece of a human sperm are able to play an important role in human fertilization?
Question 13:
(a) Study the given diagram showing the sectional view of a seminiferous tubule. [Diagram is implied]
(b) Answer the following questions :
OR
Study the figures given below showing initial stages in the formation of female gametophyte and answer the questions that follow. [Figures P and Q are implied, showing Megasporogenesis]
(b) Answer the following questions :
- (i) Label A, B, C and D in the figure.
- (ii) What will be the number of chromosomes in secondary spermatocyte and spermatid respectively?
- (iii) Explain the terms Spermiogenesis and Spermiation.
OR
Study the figures given below showing initial stages in the formation of female gametophyte and answer the questions that follow. [Figures P and Q are implied, showing Megasporogenesis]
- (i) Identify (P) and (Q).
- (ii) What kind of division does cell (P) undergo to form (Q)? How many (Q) cells form the embryo sac? What is the name given to such kind of development?
- (iii) How many free nuclear mitotic divisions will the functional megaspore undergo to form the embryo sac?
- (iv) Describe the structure of a mature female gametophyte.
Question 14:
(i) Draw a diagram of a human sperm. Label any four parts and write their functions.
(ii) In a human female, probability of an ovum to get fertilized by more than one sperm is impossible. Give reason.
(ii) In a human female, probability of an ovum to get fertilized by more than one sperm is impossible. Give reason.
Question 15:
Study the graphs given below for Case 1 and Case 2 showing different levels of certain hormones and answer the question that follows: [Diagram].
(a) Which hormone is responsible for the peak observed in Case 1 and Case 2? Write one function of that hormone.
(b) Write changes that take place in the ovary and uterus during follicular phase.
Student to attempt either sub-part (c) or (d):
(c) Name the hormone Q of Case 2. Write one function of hormone Q.
OR
(d) Which structure in the ovary will remain functional in Case 2? How is it formed?
Question 16:
In a human female, the reproductive phase starts on the onset of puberty and ceases around middle age of the female. Study the graph given below regarding menstrual cycle and answer the questions that follow :
[Graph of Menstrual Cycle]
(a) Name the hormones and their source organ, which are responsible for menstrual cycle at puberty.
(b) For successful pregnancy, at what phase of the menstrual cycle an early embryo (upto 3 blastomeres) should be Implanted in the Uterus (IUT) of a human female who has opted for Assisted Reproductive Technology (ART)? Support your answer with a reason.
(c) Name the hormone and its source organ responsible for the events occurring during proliferative phase of menstrual cycle. Explain the event.
**OR**
(c) In a normal human female, why does menstruation only occurs if the released ovum is not fertilised ? Explain.
[Graph of Menstrual Cycle]
(a) Name the hormones and their source organ, which are responsible for menstrual cycle at puberty.
(b) For successful pregnancy, at what phase of the menstrual cycle an early embryo (upto 3 blastomeres) should be Implanted in the Uterus (IUT) of a human female who has opted for Assisted Reproductive Technology (ART)? Support your answer with a reason.
(c) Name the hormone and its source organ responsible for the events occurring during proliferative phase of menstrual cycle. Explain the event.
**OR**
(c) In a normal human female, why does menstruation only occurs if the released ovum is not fertilised ? Explain.