Tag: introduction to reproduction

Questions Related to introduction to reproduction

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

Show answer
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

Show answer
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

Show answer
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'

Number of fertilized eggs in ootheca of Cockroach is

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

  1. 16 pairs in two rows

  2. 16 in two rows

  3. 10 in one row

  4. 8 in two rows

Show answer
Correct Option: B
Explanation:

In cockroach, the fertilized eggs are encased in a casing called the oothecae. Ootheca of cockroach contains 16 fertilized eggs in two rows (8 + 8). 

So, the correct answer is '16 in two rows'.

In Cockroach, ootheca is produced by secretion of 

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

  1. Conglobate gland

  2. Phallic gland

  3. Colleterial gland

  4. Mushroom gland

Show answer
Correct Option: C
Explanation:

In Cockroach, there are a pair of collaterial glands. A pair of branched collaterial glands open into genital chamber. The secretion of collaterial glands secrete oothecal case.

So, the correct answer is 'Colleterial gland'.

In Cockroach, conglobate gland occurs in

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

  1. Females

  2. Males

  3. Nymph

  4. Both A and B

Show answer
Correct Option: B
Explanation:

The phallic or conglobate gland is an elongated and flattened gland that lies below ejaculatory duct in males. The posterior end is narrow and opens separately by the side of the male genital pore.

So, the correct answer is 'Males'.

Fertilized eggs of Periplaneta americana are encased in

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

  1. Ootheca

  2. Cocoon

  3. Phallomere

  4. Genital chamber

Show answer
Correct Option: A
Explanation:

The female reproductive system has two large ovaries that are present laterally in the 2nd to the 6th abdominal segments. A group of eight ovarian tubules forms one ovary. They contain a chain of developing ova. The fertilized eggs are encased in a casing called the oothecae. Female cockroaches produce around 9 to 10 oothecae which contain around 14 to 16 eggs each.

So the correct answer is 'Ootheca'.