Biology

Invertebrate Zoology

634 Questions

Invertebrate zoology covers the anatomical and physiological characteristics of animals without backbones, focusing heavily on insects, earthworms, and other arthropods. These questions explore structural components like respiratory organs and excretory systems. This topic forms a crucial part of the biology section in various competitive exams.

Cockroach anatomyEarthworm organsInsect ordersRespiratory organsExcretory organs

Invertebrate Zoology Questions

Multiple choice biology biology : an introduction introduction to organization of life signs of life what is living?

Mosquitoes, ant, dung beetle, butterfly, moth and cockroach all have same

  1. Number of legs

  2. Segmentation

  3. Colour of the body

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

Mosquitoes, ant, dung beetle, butterfly, moth, and cockroach all belong to class Insecta of phylum Arthropoda. They have one pair of antennae, three pairs of legs, and three body regions i.e., head, thorax, and abdomen. Thus, the correct answer is option D.

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

Mushroom gland is part of

  1. Male reproductive system of Cockroach

  2. Female reproductive system of Cockroach

  3. Male reproductive system of Rabbit

  4. Female reproductive system of Rabbit
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The mushroom gland is a large accessory male reproductive gland in the cockroach, which is whitish in colour and situated at the junction of vasa deferentia with the ejaculatory duct. It has a mass of glandular tubules of three kinds, the peripheral long tubules or utriculi majors, the central tubules are small short tubules or utriculi breviores and behind the short central tubules are some short but more bulbous tubules forming the seminal vesicles filled with sperms. 

So, the correct answer is 'Male reproductive system of Cockroach'.

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

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

  1. 7th, 8th and 9th segments

  2. 8th, 7th and 9th segments

  3. 9th, 8th an 7th segments

  4. 8th, 9th and 7th segments
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

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

  1. A single median oviduct

  2. Spermatheca

  3. A pair of anal cerci

  4. A pair of collateral glands
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

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

  1. Collateral glands

  2. Seminal vesicles

  3. Phallic gland

  4. Conglobate glands
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The secretions of the collateral glands in the female cockroach harden to form the protective egg case, known as the ootheca.

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
A Correct answer
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'.