12th Grade > Biology
HUMAN REPRODUCTION MCQs
Total Questions : 57
| Page 5 of 6 pages
Answer: Option C. -> Leydig cells
:
C
Leydig cells or interstitial cells of testes secrete the hormone testosterone which is responsible for secondary sexual characteristics of males. These cells are present between the seminiferous tubules of testes.
:
C
Leydig cells or interstitial cells of testes secrete the hormone testosterone which is responsible for secondary sexual characteristics of males. These cells are present between the seminiferous tubules of testes.
Question 42. In the given cross section of testis, identify the labelled parts and match them with their relative description given alongside.
i. storage area for the sperm
ii. carry the sperm from the testes to the epididymis
iii. encases the testis and forms testicular lobules
iv. the seminiferous tubles open into this
v. has germinal and sertoli cells
i. storage area for the sperm
ii. carry the sperm from the testes to the epididymis
iii. encases the testis and forms testicular lobules
iv. the seminiferous tubles open into this
v. has germinal and sertoli cells
Answer: Option B. -> 1 - iii, 2 - v, 3 - iv, 4 - ii, 5 - i
:
B
The inner covering of the testes is known as the tunica albuginea which dip into the tissue of the testes, dividing it into testicular lobules. Each testicular lobule houses 2 to 3 coiled tubules running through each of these lobules known as the seminiferous tubules. These tubules have 2 kinds of cells - sertoli cells and cuboidal germinal cells which undergo various stages of differentiation to form sperm. The sperm formed here leaves the lobule through the rete testis which opens into ductules called the vasa efferentia. The vasa efferentia leads to the epididymis where sperm can be stored.
:
B
The inner covering of the testes is known as the tunica albuginea which dip into the tissue of the testes, dividing it into testicular lobules. Each testicular lobule houses 2 to 3 coiled tubules running through each of these lobules known as the seminiferous tubules. These tubules have 2 kinds of cells - sertoli cells and cuboidal germinal cells which undergo various stages of differentiation to form sperm. The sperm formed here leaves the lobule through the rete testis which opens into ductules called the vasa efferentia. The vasa efferentia leads to the epididymis where sperm can be stored.
Answer: Option A. -> The offsprings produced are not identical to the parents
:
A
In asexual reproduction only one parent is involved; as a result the offsprings formed are identical to the parent. Due to this there is very less or no genetic diversity among the organisms reproducing in this manner. Since, genetic diversity is the key to evolution and betterment of species, in asexually reproducing organisms, genetic diversity can be introduced by gene mutation.
:
A
In asexual reproduction only one parent is involved; as a result the offsprings formed are identical to the parent. Due to this there is very less or no genetic diversity among the organisms reproducing in this manner. Since, genetic diversity is the key to evolution and betterment of species, in asexually reproducing organisms, genetic diversity can be introduced by gene mutation.
Answer: Option B. -> Zygote contains DNA from both the parents
:
B
Azygoteis a cell formedby the union of the ovum (i.e., egg cell)or the female gamete, and the spermor the male gamete. It contains the DNA from both its parents. The zygote then multiplies and develops through the process of cell division to form the embryo. The zygote is the first stage of development of the fertilised cell. While it is common for animals to keep the zygote inside their bodies, many animals including birds and most reptiles lay eggs, where the zygote eventually develops. Pregnancy starts once the zygote forms, and ends when the mother gives birth to the baby.
:
B
Azygoteis a cell formedby the union of the ovum (i.e., egg cell)or the female gamete, and the spermor the male gamete. It contains the DNA from both its parents. The zygote then multiplies and develops through the process of cell division to form the embryo. The zygote is the first stage of development of the fertilised cell. While it is common for animals to keep the zygote inside their bodies, many animals including birds and most reptiles lay eggs, where the zygote eventually develops. Pregnancy starts once the zygote forms, and ends when the mother gives birth to the baby.
Answer: Option C. -> There is fluid accumulation within the tunica albuginea
:
C
Hydrocele manifests as enlargement of the testes due to an accumulation of fluid within the inner covering of the testis, the tunica albuginea, or in the spermatic cord. The most common cause is due to defective absorption of lymphatic fluid by degenerating lymphatic vessels.
:
C
Hydrocele manifests as enlargement of the testes due to an accumulation of fluid within the inner covering of the testis, the tunica albuginea, or in the spermatic cord. The most common cause is due to defective absorption of lymphatic fluid by degenerating lymphatic vessels.
Answer: Option A. -> Tunica albuginea
:
A
The testes (testicles) are the male gonads, that is they are the primary male reproductive organs.The multilayered tunica covers the testes. It facilitates blood supply to the testes and creates a partition between sperm-producing regions of the testes.Thetunica albugineais thefibrouscovering of thetestes. It is a dense blue-greymembrane, composed of bundles of white fibrousconnective tissue.
:
A
The testes (testicles) are the male gonads, that is they are the primary male reproductive organs.The multilayered tunica covers the testes. It facilitates blood supply to the testes and creates a partition between sperm-producing regions of the testes.Thetunica albugineais thefibrouscovering of thetestes. It is a dense blue-greymembrane, composed of bundles of white fibrousconnective tissue.
Answer: Option B. -> After the ovum has been penetrated by a sperm
:
B
In mammalian ovum, during maturation phase, meiosis occurs. Nucleus shifts towards animal pole and undergoes meiosis-I. After fertilization the second meiotic division is completed with unequal cytoplasmic cleavage. This forms a large cell called the ootid, with essentially whole of the cytoplasm and a very small cell, the second polar body.
:
B
In mammalian ovum, during maturation phase, meiosis occurs. Nucleus shifts towards animal pole and undergoes meiosis-I. After fertilization the second meiotic division is completed with unequal cytoplasmic cleavage. This forms a large cell called the ootid, with essentially whole of the cytoplasm and a very small cell, the second polar body.
Answer: Option D. -> Secondary sexual characteristics include the ovary and penis
:
D
Primary sexual characteristicsare present from birth and are directly concerned with reproduction and allow the differentiation of males and females. The ovary in females and penisin males are primary sexual characters. Secondary sexual characters appear during puberty due to the hormones released during this time. Primary and secondary sexual characteristicsdifferentiate males and females in a sexually dimorphic species. Secondary sexual characteristics are not concerned with reproduction or production of gametes.
:
D
Primary sexual characteristicsare present from birth and are directly concerned with reproduction and allow the differentiation of males and females. The ovary in females and penisin males are primary sexual characters. Secondary sexual characters appear during puberty due to the hormones released during this time. Primary and secondary sexual characteristicsdifferentiate males and females in a sexually dimorphic species. Secondary sexual characteristics are not concerned with reproduction or production of gametes.
Answer: Option A. -> True
:
A
Sexual reproduction is characterised by the formation of a new individual by the union of two gametes. Although the offsprings obtain parental traits, they are not identical to their parents due to genetic recombination. Genetic recombination introduces new gene combinations and variations in a population, whichis a vital property differentiating sexual from asexual reproduction.
:
A
Sexual reproduction is characterised by the formation of a new individual by the union of two gametes. Although the offsprings obtain parental traits, they are not identical to their parents due to genetic recombination. Genetic recombination introduces new gene combinations and variations in a population, whichis a vital property differentiating sexual from asexual reproduction.
Answer: Option D. -> Testes to epididymis
:
D
Vasa efferetia are 10 to 20 fine tubules which connect rete testis with the epididymis. The latter is a pair of ducts from each testis which is formed by union of its vasa efferentia. If the vasa efferentia getblocked, the sperms will not be transported from testis to epididymis.
:
D
Vasa efferetia are 10 to 20 fine tubules which connect rete testis with the epididymis. The latter is a pair of ducts from each testis which is formed by union of its vasa efferentia. If the vasa efferentia getblocked, the sperms will not be transported from testis to epididymis.
Latest Videos
Latest Test Papers
Login With Google
Old way of Login
Login With Email