Tag: for the continuity of generation

Questions Related to for the continuity of generation

Consider the following three statements related to the human male reproductive system and select the correct option stating which ones are true (T) and which ones are false (F).


(i) The middle piece of spermatozoon is also termed as the powerhouse of the spermatozoon.
(ii) Vas deferens joins a duct from the seminal vesicle and forms vasa efferentia.
(iii) Semen is a collection of secretions from the seminal vesicles, prostate gland and Cowper's glands and sperms from testes.

biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

  1. (i) - T, (ii) - F, (iii) - T

  2. (i) - F, (ii) - F, (iii) - T

  3. (i) - T, (ii) - T, (iii) - F

  4. (i) - F, (ii) - T, (iii) - T

Show answer
Correct Option: A

Fill up the blanks in the following paragraph by selecting the correct option.
(i) are the primary female sex organs that produce (ii) and (iii). Each primary sex organ is about (iv) in length and is connected to the pelvic wall and uterus by (v).

biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

  1. (i)-Testes, (ii)-sperms, (iii)-hormones, (iv)-4-5 cm, (v)-ligaments

  2. (i)-Ovaries, (ii)-oogonia, (iii)-follicles, (iv)-2-4 cm, (v)-muscles

  3. (i)-Ovaries, (ii)-ovum, (iii)-hormones, (iv)-2-4 cm, (v)-ligaments

  4. (i)-Testes, (ii)-sperms, (iii)-testosterone, (iv)-8-9 cm, (v)-muscles

Show answer
Correct Option: C
Explanation:

Ovaries are the primary female sex organs that produce the female gamete/germ cell ovum and several steroid hormones such as estrogen and progesterone also called ovarian hormones. Each ovary is about 2-4 cm in length and is connected by ligaments to the pelvic wall and the uterus.  Each ovary is whitish in colour and located alongside the lateral wall of the uterus and the other side points downwards attached to the uterus via the ovarian ligament.

So, the correct option is '(i)-Ovaries, (ii)-ovum, (iii)-hormones, (iv)-2-4 cm, (v)-ligaments'.

Spot the odd one out from the following structures with reference to the male reproductive system.

biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

  1. Rete testis

  2. Epididymis

  3. Vasa efferentia

  4. Isthmus

Show answer
Correct Option: D
Explanation:

Females have two oviducts (or Fallopian tubes). Each oviduct has three regions, infundibulum, ampulla and isthmus. Isthmus is the narrow part closest to uterus, while infundibulum is the first part of oviduct that is encountered by released ova.

Given below are the three statements each with two blanks. Select the option which correctly fills up the blank in any two statements. (A) Each seminiferous tubule is lined on Its inside by two types of cells called (i) and (ii) .
(B) The seminiferous tubules open into the  (i)  through  (ii).
(C) The enlarged end of penis called the   (i)   is covered by a loose fold of skin called the   (ii)  

biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

  1. (A)-(i)spermatogonia, (ii) follicular cells

    (B)-(i) vas deferens, (ii) urethral meatus

  2. (B)-(i) vasa efferentia, (ii) rete testis

    (C)-(i) glans penis, (ii) foreskin

  3. (A)-(i) spermatogonia, (ii) Sertoli cells

    (C)-(i) urethral meatus, (ii) scrotum

  4. (A)-(i) spermatocytes, (ii) oogonia

    (B)-(i) rete testis, (ii) vasa efferentia

Show answer
Correct Option: B
Explanation:

The seminiferous tubule is present in the testicular lobule and is highly coiled and produces sperms. The seminiferous tubule opens into the vasa efferentia (small ducts) through the rete testis (a network of interconnecting tubules where the straight seminiferous tubules empty). The enlarged part of the penis or the male genitalia is called the glans penis or head of the penis (sensitive bulbous structure at the distal end of the human penis) and is covered by a foreskin (prepuce) a double-layered fold of smooth muscle tissue, blood vessels etc, to protect the glans penis and urinary meatus. 

So, the correct option  is, (B)-(i) vasa efferentia, (ii) rete testis (C)-(i) glans penis, (ii) foreskin.

________ produces sperm cells.

biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

  1. Seminal vesicle

  2. Urinary bladder

  3. Testes

  4. Cowper's gland

Show answer
Correct Option: A

In retention growth model, payout ratio is subtracted from one to calculate.

biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

  1. present value ratio

  2. future value ratio

  3. retention ratio

  4. growth ratio

Show answer
Correct Option: C

The female sex organ in Riccia and Funara is ______________.

biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

  1. Archegonium

  2. Antheridium

  3. Oospore

  4. Paraphyses

Show answer
Correct Option: A

Assertion:  In humans, the gamete contributed by the male determines whether the child produced will be male or female.

Reason:  Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on X-chromosome and some on Y-chromosome

biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

  1. If both the assertion and the reason are true and the reason

    is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true

Show answer
Correct Option: C

Overall masculine development, Gynaecomastia is expressed when fertilization occurs between 

biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

  1. Sperm (22A+X) $\times $ Egg(22A+XX)

  2. Sperm (23A+Y) $\times $ Egg(22A+X)

  3. Sperm (22A+XY) $\times $ Egg(22A+X)

  4. Sperm (22A+X) $\times $ Egg(22A+0)

Show answer
Correct Option: C
Explanation:
Klinefelter syndrome is not inherited; the addition of an extra X chromosome occurs during the formation of reproductive cells (eggs or sperm) in one of an affected person's parents. During cell division, an error called nondisjunction prevents X chromosomes from being distributed normally among reproductive cells as they form. Typically, as cells divide, each egg cell gets a single X chromosome, and each sperm cell gets either an X chromosome or a Y chromosome. However, because of nondisjunction, an egg cell or a sperm cell can also end up with an extra copy of the X chromosome.

If an egg cell with an extra X chromosome (XX) is fertilized by a sperm cell with one Y chromosome, the resulting child will have Klinefelter syndrome. Similarly, if a sperm cell with both an X chromosome and a Y chromosome (XY) fertilizes an egg cell with a single X chromosome, the resulting child will have Klinefelter syndrome.

Mosaic Klinefelter syndrome (46,XY/47,XXY) is also not inherited. It occurs as a random error during cell division early in fetal development. As a result, some of the body's cells have the usual one X chromosome and one Y chromosome (46,XY), and other cells have an extra copy of the X chromosome (47,XXY).

So the correct option is ' Sperm (22A+XY) × Egg(22A+X)'.

Reproduction in man is only-

biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

  1. Asexual

  2. Sexual

  3. Vegetative

  4. Parthenogenetic

Show answer
Correct Option: B