Tag: zoology

Questions Related to zoology

In the female cockroach, the anterior wall, roof and floor of genital pouch are formed respectively by the following abdominal sterna of

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

  1. 7th, 8th and 9th segments

  2. 8th, 7th and 9th segments

  3. 9th, 8th an 7th segments

  4. 8th, 9th and 7th segments

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Correct Option: D
Explanation:

Genital or brood pouch is a large boat-shaped structure whose floor is formed by the 7th sternite, roof and sides are formed by the 8th and 9th sternites. The genital pouch can be divided into a genital chamber into which vagina opens and an oothecal chamber where oothecae are formed. The genital chamber also receives the accessory reproductive glands. 

So, the correct answer is '8th, 9th and 7th segments'.

Collateral glands of cockroach help in?

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

  1. Fertilization

  2. Formation of ootheca

  3. Copulation

  4. Formation of oothecal chamber

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Correct Option: A

Which of the following structures does not open into the genital chamber of female cockroaches?

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

  1. A single median oviduct

  2. Spermatheca

  3. A pair of anal cerci

  4. A pair of collateral glands

Show answer
Correct Option: A
Explanation:

The genital pouch of female cockroach can be divided into two parts. The anterior smaller part containing the openings of female gonopore, pores of spermathecae and collateral glands is called genital chamber, while the larger posterior part in which ootheca is formed is called oothecal chamber or vestibulum. Oviduct doesn't open into the genital chamber.

So, the correct option is 'A single median oviduct'.

Glands whose secretions are responsible for formation of ootheca in female cockroach are?

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

  1. Collateral glands

  2. Seminal vesicles

  3. Phallic gland

  4. Conglobate glands

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Correct Option: A

Read the following statements carefully, which is incorrect about cockroach?

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

  1. In cockroach one pair testis present from $4$ to $6^{th}$ abdominal segments

  2. Mushroom shaped gland is present in the $6^{th}$ - $7^{th}$ abdominal segments

  3. Sperms are stored in the seminal vesicles

  4. The external ganitalia are represented by phallic gland

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Correct Option: A

Select the incorrect statement among the following.

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

  1. Paurometabolous development occurs in Periplaneta and it involves $13$ moults for nymph to grow into an adult

  2. Sperms in males are stored in seminal vesicles while they are stored in spermatheca in a female cockroach

  3. Mosaic vision in cockroach is characterised by high resolution but less sensitivity

  4. Nitrogenous waste in haemolymph of cockroach are found in form of potassium urate

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Correct Option: A

Cockroach and earthworm have common type of

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

  1. Heart

  2. Nerve cord

  3. Nephridia

  4. Spermathecae

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Correct Option: D
Explanation:

Cockroach and earthworm have common type of  spermatheca The spermathecae receive and store  sperm cells during copulation .

In Cockroach an ovary is formed of ovarioles

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

  1. 4

  2. 6

  3. 8

  4. 10

Show answer
Correct Option: C
Explanation:

Each ovary is formed of a group of eight ovarian tubules or ovarioles containing a chain of developing ova. An ovariole is made up of an epithelial layer resting on a basement membrane and enclosed externally in a connective tissue coat. Hence In cockroach, an ovary is formed of 8 ovarioles.

So the correct answer is "8".

Cockroach has a stomadaeal valve between 

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

  1. Crop and gizzard

  2. Gizzard and mesenteron

  3. Mesenteron and ileum

  4. Ileum and colon

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Correct Option: B
Explanation:

The gizzard is an outer layer of thick circular muscles and has a thick cuticle forming six highly chitinous plate called teeth. Gizzard helps in grinding the food particles. The entire foregut is lined by the cuticle. Gastric caecae are present in the foregut and midgut., which secrete digestive juice. A stomadaeal valve is present in between the gizzard and the midgut (mesenteron).

So the correct answer is "Gizzard and mesenteron".

Periplanata shows

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

  1. Complete metamorphosis

  2. Incomplete metamorphosis

  3. No metamorphosis

  4. Gradual metamorphosis

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Correct Option: D
Explanation:

Cockroach follow a hemimetabolous mode of metamorphosis. It is also known as gradual metamorphosis. The hemimetabolous life cycle consists of egg, nymph and adult.

So, the correct answer is 'Gradual metamorphosis'