Tag: introduction to reproduction

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Questions Related to introduction to reproduction

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

Read the following statements carefully, which is incorrect about 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
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The statement claiming that external genitalia are represented by the phallic gland is incorrect; the phallic gland is part of the male accessory reproductive glands, while external genitalia are represented by male gonapophysis or phallomere.

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

Select the incorrect statement among the following.

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice zoology study of animal type - cockroach introduction to reproduction reproduction in cockroach reproductive system of cockroach

In Cockroach an ovary is formed of ovarioles

  1. 4

  2. 6

  3. 8

  4. 10
Reveal answer Fill a bubble to check yourself
C Correct answer
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".

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

Cockroach has a stomadaeal valve between 

  1. Crop and gizzard

  2. Gizzard and mesenteron

  3. Mesenteron and ileum

  4. Ileum and colon
Reveal answer Fill a bubble to check yourself
B Correct answer
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".

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

Periplanata shows

  1. Complete metamorphosis

  2. Incomplete metamorphosis

  3. No metamorphosis

  4. Gradual metamorphosis
Reveal answer Fill a bubble to check yourself
D Correct answer
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'

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

Number of fertilized eggs in ootheca of Cockroach is

  1. 16 pairs in two rows

  2. 16 in two rows

  3. 10 in one row

  4. 8 in two rows
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

In Cockroach, ootheca is produced by secretion of 

  1. Conglobate gland

  2. Phallic gland

  3. Colleterial gland

  4. Mushroom gland
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

In Cockroach, conglobate gland occurs in

  1. Females

  2. Males

  3. Nymph

  4. Both A and B
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

Fertilized eggs of Periplaneta americana are encased in

  1. Ootheca

  2. Cocoon

  3. Phallomere

  4. Genital chamber
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.