Tag: reproduction in cockroach

Questions Related to reproduction in cockroach

Statement a. Secretion of colleterial gland forms the egg case in Cockroach
Statement b. The development of Cockroach is hemimetabolous.

zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. Both the statements, a and b, are correct and b is the reason for a

  2. Both the statements, a and b, are correct but b is not the reason for a

  3. Statement a is correct but statement b is wrong

  4. Statement b is correct but statement a is wrong

Show answer
Correct Option: C
Explanation:

The colleterial glands of insects are organs associated with the female genital apparatus. In cockroaches, these glands produce secretions that cover two parallel rows of eggs during oviposition, and in oviparous species, these secretions become the tanned, sculpted, rigid outer casing of the ootheca.

Hemimetabolous or incomplete metamorphosis: The insects which attain adult forms by gradual morphological change with succes­sive moults are called incomplete metamor­phosis or hemimetabolous development. This type of metamorphosis is seen in insects like butterflies, moths, beetles, ants, etc.
So, the first statement that the secretion of colleterial gland forms the egg case in Cockroach is correct while the second statement saying The development of Cockroach is hemimetabolous is incorrect and the first and the second statements are not related to each other.
Hence, the correct option is 'C'.

In Periplaneta, which one helps in nourishing the sperms

zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. Ejaculatory duct

  2. Vas deferens

  3. Utriculi majores

  4. Utriculi breviores

Show answer
Correct Option: D
Explanation:

A mushroom-shaped gland is present in 6th and 7th abdominal segments of a male cockroach. It acts as an accessory reproductive gland. The mushroom gland has two types of tubules:

a) Utriculimajores/peripheral tubules: Form the inner layer of spermatophore
b) Utriculibreviores: Nourishes the sperms. 
So, the correct answer is 'Utriculi breviores'.

In male cockroaches, sperms are stored in which part of the reproductive system?

zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. Seminal vesicles

  2. Mushroom glands

  3. Testes

  4. Vas deferens

Show answer
Correct Option: A
Explanation:
  1. Testes lie dorsolaterally in the 4th and 5th abdominal segments, and they are the region of sperm production.
    2. Vas deferens are a pair of ducts arising from the testis as very thin whitish tubes, they continue posterioventrally beneath the rectum. They unite at a short distance into the ejaculatory duct.
    3. Mushroom gland is a large accessory reproductive gland, whitish in colour and situated at the junction of vasa deferentia with the ejaculatory duct. It has a mass of glandular tubules of two kinds; utriculi majores and utriculi breviores.
    4. The sperms produced from testes, while the cockroach is still young, are brought by the vasa deferentia into the seminal vesicles for storage. The sperms in the seminal vesicles are glued together in the form of bundles called spermatophores. 
    So, the correct option is 'Seminal vesicles'.
Select the correct statement from the ones given below with respect to Periplaneta americana
zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal connectives

  2. Male bear a pair of short thread like anal styles

  3. There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut

  4. Grinding of food is carried out only by the mouth parts

Show answer
Correct Option: B
Explanation:

In male cockroach, from the sides of the 9th sternum, there arises a paired, small unjointed outgrowths called anal styles. These structures are sensitive to touch.These are absent in female cockroach. Nervous system is located ventrally. There are 100-150 Malpighian tubules. Grinding of food is carried our by mouth parts and gizzard.

Male cockroach differs from female cockroach in having

zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. antennae

  2. labrum

  3. maxillae

  4. anal styles.

Show answer
Correct Option: D
Explanation:

1. The body of female cockroach is relatively larger than the male.

2. The abdomen of female cockroach is boat-shaped and the last segment is blunt.

3. The wings of female cockroach are smaller than that of the males and extend up to the tip of the abdomen.

4. The antennae are relatively larger than that of the males.

5. Only a pair of anal cerci is present in of female cockroach.

6. The sternum of mesothorax is bifid.

So the correct option is 'anal styles'.

The post embryonic stages in the life history of cockroach is known as

zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. Larval

  2. Grubs

  3. Caterpillar

  4. Nymphs

Show answer
Correct Option: D
Explanation:

All cockroaches develop by completing a life cycle consisting of three distinct stages: egg, nymph, and adult.

So, the correct option is  D. ( nymphs )

Match the following with reference to cockroach and choose the correct option.

(A) Phallomere (i) Chain of developing ova
(B) Gonopore (ii) Bundles of sperm
(C) Spermatophore (iii) Opening of the ejaculatory duct
(D) Ovarioles (iv) The external genitalia
zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. A- (iii), B- (iv), C- (ii), D- (i)

  2. A- (iv), B- (iii), C- (ii), D- (i)

  3. A- (iv), B- (ii), C- (iii), D- (i)

  4. A- (ii), B- (iv), C- (iii), D- (i)

Show answer
Correct Option: B
Explanation:

(A) Phallomere - The external genitalia

(B) Gonopore - Opening of ejaculatory duct
(C) Spermatophore - Bundles of sperm
(D) Ovarioles - Chain of developing ova
So, the correct answer is (b).

Phallic organs in cockroach are related to

zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. Male excretory system

  2. Male reproductive system

  3. Female excretory system

  4. Female reproductive system

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Correct Option: B
Explanation:
Phallic gland is a large club shaped gland present below ejaculatory duct. This gland secretes the outer layer of spermatophore.
So, the correct option is 'male reproductive system'

Sexual dimorphism is distinct in

zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. Hydra

  2. Earthworm

  3. Sponge

  4. Cockroach

Show answer
Correct Option: D
Explanation:

Sexual dimorphism is the differences in appearance between males and females of the same species. The adult males have full wings covering their body, while females have only tiny wing stubs, their tegmina (forewings) being around a fourth of their body length.
Therefore, the correct answer is option D.

In cockroach which is helpful in sexual attraction?

zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. Hormone ecdyson

  2. Pheromone

  3. Juvenile hormone

  4. Anal cerci

Show answer
Correct Option: B
Explanation:

Sex pheromones are released by an organism to attract an individual for mating. Cockroaches form the dominance hierarchies based on pheromone badges, while females use the same pheromone for male choice.
Therefore, the correct answer is option B.