Tag: reproduction in cockroach

Questions Related to reproduction in cockroach

Stink glands are found in 

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

  1. Only in males

  2. Only in female

  3. Both A and B

  4. None of the above

Show answer
Correct Option: C
Explanation:

The intersegmental membrane between the 5th and 6th terga is depressed on either side of the stink gland. These glands are present in both male and female cockroaches and produce a secretion with a characteristic odour. The secretion is a pheromone which helps to attract the opposite sex.
Therefore, the correct answer is option C.

Egg of Cockroach is

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

  1. Mesolecithal

  2. Centrolecithal

  3. Telolecithal

  4. Alecithal

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Correct Option: B
Explanation:

Eggs of cockroach are centrolecithal. During cytokinesis, centrolecithal zygotes undergo meroblastic cleavage, where the cleavage plane extends only to the accumulated yolk and is superficial. This is due to the large dense yolk found within centrolecithal eggs and helps in delayed embryonic development.

So the correct answer is "Centrolecithal".

In Cockroach, ootheca is formed by secretion of

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

  1. Phallic gland

  2. Mushroom gland

  3. Colleterial gland

  4. All the above

Show answer
Correct Option: C
Explanation:

The colleterial glands open into the vestibulum and secrete most of the protein and tanning agent. The protein may not be directly concerned with ootheca formation, while the latter probably secretes the alkali-resistant outer layer of the ootheca.
The anterior and posterior parts of cockroach secreting the structural protein which produces most of the material used in the formation of the ootheca.

So the correct answer is "Colleterial gland".

Young Cockroach is called

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

  1. Maggot

  2. Nymph

  3. Ephyra

  4. Pupa

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Correct Option: B
Explanation:

Cockroach eggs hatch because of the combined pressure of the hatchlings within. Upon emerging from the egg case, or ootheca, this immature form of cockroach is known as a nymph or baby cockroach. Nymphs are bright white in color initially. Cockroach nymphs are grayish-brown in color and darken with each progressive molt.  Cockroach nymphs undergo a series of molts. They emerge as full adults from their final molt.

So the correct answer is 'Nymph'.

Male cockroach is identified by the presence of

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

  1. Green gland

  2. Anal style

  3. Anal cercus

  4. Broad abdomen

  5. Colleterial gland

Show answer
Correct Option: B
Explanation:

The abdomen is made up of 10 segments. The 7th, 8th and 9th sterna form a genital pouch in females. In males, the genital pouch is present at the hind end of the abdomen. The male cockroach has thread-like anal styles, which are missing in the female cockroach. Hence, Male Cockroach is identified by the presence of anal style.

So the correct answer is 'Anal style'.

Choose the correct answer from the allternatives given.
In which of these organs sperms are nourished and stored in cockroach

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

  1. Testes

  2. Utricular gland

  3. Ejaculatory duct

  4. Conglobate gland

Show answer
Correct Option: C
Explanation:

In cockroaches, the sperm is stored in the seminal vesicles and are glued together in the form of bundles called spermatophores and discharged during copulation. Seminal vesicles are the part of the ejaculatory duct.

So, the correct option is 'Ejaculatory duct'.

In cockroach, the ootheca is formed by the secretion of 
zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. phallic gland

  2. collaterial gland

  3. mushroom gland

  4. conglobate gland

Show answer
Correct Option: B
Explanation:

Collaterial glands are present in female cockroach as part of reproductive system. These glands are branched tubular glands opening independently on the dorsal side of the genital chamber. The secretion produced by these glands forms the oothecal case of ootheca.

Consider the following four statements (i)- (iv) and select the correct option stating which ones are true (T) and which ones are false (F)
(i) In male cockroach, genital pouch or chamber lies at the hind end of abdomen bounded dorsally by 9th and 10th terga and ventrally by the 9th sternum.
(ii) In cockroach, the haemolymph is composed of colourless plasma and haemocytes
(ii) In female cockroach each ovary is formed of a group of ten ovarian tubules or ovarioles, containing a chain developing ova
(iv) In cockroach the nymph grows by moulting about 13 times to reach the adult form.
zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. (i)- F; (ii)- T; (iii)- F; (iv)- T

  2. (i)- F; (ii)- F; (iii)- T; (iv)- T

  3. (i)- T; (ii)- T; (iii)- F; (iv)- T

  4. (i)- T; (ii)- F; (iii)- T; (iv)- f

Show answer
Correct Option: C
Explanation:

In female cockroach, each ovary is formed of a group of eight ovarian tubules or ovarioles, containing a chain of developing ova.

The development of Periplaneta americana is
zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

  1. holometabolous

  2. paurometabolous

  3. ametabolous

  4. heminetabolous

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Correct Option: B
Explanation:

The development of Periplaneta americana is paurometabolous, i.e., there is development through nymphal stage.