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

In Cockroach, ootheca is formed by secretion of

  1. Phallic gland

  2. Mushroom gland

  3. Colleterial gland

  4. All the above
Reveal answer Fill a bubble to check yourself
C Correct answer
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".

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

Young Cockroach is called

  1. Maggot

  2. Nymph

  3. Ephyra

  4. Pupa
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

Male cockroach is identified by the presence of

  1. Green gland

  2. Anal style

  3. Anal cercus

  4. Broad abdomen

  5. Colleterial gland
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

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

  1. Testes

  2. Utricular gland

  3. Ejaculatory duct

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

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

  1. phallic gland

  2. collaterial gland

  3. mushroom gland

  4. conglobate gland
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

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

Multiple choice zoology environmental factors environmental factors and their measurements climate factors marine life

An endotherm

  1. Grasshopper

  2. Hydra

  3. Earthworm

  4. Blue jay

  5. Frog
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The organisms that use external heat to maintain their body temperature are termed as ectotherms while those maintaining their body temperature using the metabolic heat are termed as endotherms (mammals and aves). Among the given options, Blue jay (aves) is endotherms. 

Therefore, the correct answer is option D.

Multiple choice zoology environmental factors environmental factors and their measurements climate factors marine life

Which of the following options is correct?
     Homoiothermic                           Poililothermic
      organism                                       organism    

  1. MAN Cow

  2. Cockroach Man

  3. Lizard Frog

  4. Cow Frog
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Animals with constant body temperature are called homoootherms. They have insulating coat to check the loss of body heat. This coat consists of hair in most mammals, blubber (subcutaneous fat) in whales and perspiration cools down the body of these animals when required.These are also termed endothermic as they regulate their body temperature by physio;logical means and maintain more or less constant internal temperature. Poililotherms are cold-blooded animals which are unable to regulate their body temperature which changes with change in temperature of environment e.g. fish, frog, lizard. They are also called as ectothems.

Multiple choice zoology excretion and osmoregulation micturition urine and urine formation urine formation

Consider the following statements each with two blanks.


(i) Annelids have (1) and insects have (2) for excretion.
(ii) Blood enters the glomerulus via (3) arteriole and leaves via (4) arteriole.
(iii) During micturition, the urinary bladder (5) and urethral sphincters (6).
Which one of the following options correctly fills the blanks in any two of the above statements?

  1. $(1)$-Malphigian tubules, $(2)$-Flame cells, $(5)$- Contracts, $(6)$- Relax
  2. $(3)$-Afferent, $(4)$-Efferent, $(5)$- Contracts, $(6)$- Relax
  3. $(1)$- Nephridia, $(2)$-Malpighian tubules, $(5)$- Relaxes, $(6)$- Contract
  4. $(3)$- Efferent, $(4)$-Afferent, $(5)$- Relaxes, $(6)$- Contract
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  1. Annelids have nephridia and insects have malphaghian tubules for excretion.
  2. Blood enters the glomerulus via afferent arteriole and leaves via efferent arteriole.
  3. During micturition, the urinary bladder contract and urethral sphincters relax to let the urine pass out from the body.
So, the correct answer is (B);

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

How many moulting occur, from egg laying to the development of adult cockroach?

  1. 10 - 12 times

  2. 9 times

  3. 6 times

  4. 3 - 4 times
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Each time the molting process is completed the cockroach will get bigger, change in color, and look more like an adult cockroach. The nymph stage of the cockroach life cycle can take anywhere from a month and a half to several years, depending on the environment, the type of cockroach, and the prevalence of cockroach disease and parasites. When the cockroach reaches its adult size it will not moult again. Many types of cockroaches will complete their transformation into adulthood with a pair of wings. Young adults may look almost exactly like a nymph, with the wings being the one characteristic that easily sets the two apart. The number of moultings in cockroach after hatching and development of a complete animal are more than 10 and they vary from one cockroach type to another.

So, the correct answer is option A.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Ootheca of cockroach has .................. fertilized eggs.

  1. 6

  2. 8

  3. 16

  4. 24
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cockroaches are oviparous. The egg hatches at specific conditions to give birth to young ones. The eggs are carried by the mother cockroach around in a sac called an ootheca, which is attached to her abdomen. The number of eggs in each ootheca are about 16 and varies from species to species. Many female cockroaches drop or hide their ootheca shortly before the eggs are ready to hatch. Others continue to carry the hatching eggs and care for their young after they are born. But regardless of how long the mother and her eggs stay together the ootheca. 

So, the correct answer is option C.

Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

The life cycle of the common housefly follows which pathway?

  1. Egg $\rightarrow $ Pupa $\rightarrow $ Larva $\rightarrow $ Adult fly
  2. Egg $\rightarrow $ Adult fly $\rightarrow $ Larva $\rightarrow $ Pupa
  3. Egg $\rightarrow $ Larva stage 1 $\rightarrow $ Larva stage 2 $\rightarrow $ Adult fly
  4. Egg $\rightarrow $ Larva $\rightarrow $ Pupa $\rightarrow $ Adult fly
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The housefly undergoes complete metamorphosis, which consists of four stages: egg, larva (maggot), pupa, and adult.

Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

The thorax of housefly contains ........... pairs of legs.

  1. One

  2. Two

  3. Three

  4. Zero
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Housefly belongs to the largest phylum known as arthropoda which is characterized by joint appendages. The thorax of housefly contains three pairs of legs. The legs have sharp claws and spines which help the fly to cling to objects.

So, the correct answer is option C.

Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Adult housefly can also be known as

  1. Pupa

  2. Imago

  3. Puparium

  4. Maggot
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Housefly undergoes several phases during metamorphosis. The mature egg turns into a larva which grows to pupa which finally forms an imago. Imago is generally colourless. Its wings are colourless and immobile.

So, the correct answer is option B.