Biology

Invertebrate Zoology

799 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
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

During unfavourable conditions most of the fresh water sponges and few marine sponges from gemmules, they are

  1. Reduction bodies

  2. External buds

  3. Internal buds

  4. Masses of interstitial cells surrounded by spicules
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Gemmules are internal buds containing archaeocytes, mostly found in freshwater sponges, these are concerned with asexual reproduction.
These are formed by the sponges under unfavourable conditions.
So, the correct option is 'internal buds'

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 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.

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

Mature larva of Housefly is

  1. Caterpillar

  2. Wriggler

  3. Grub

  4. Maggot.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • The female housefly usually mates only once and stores the sperm for later use. She lays batches of about 100 eggs on decaying organic matter such as food waste, carrion, or faeces. These soon hatch into legless white mature larvae, known as maggots.
  • This larval stage is further followed by pupa and adult stages.
  • Hence Mature larva of Housefly is Maggot.
  • So, the correct answer is 'Maggot'.
Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Pupa occurs in the life cycle of

  1. Cockroach

  2. Housefly

  3. Honey Bee

  4. Earthworm.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The pupal stage occurs only in holometabolic insects i.e those that undergo a complete metamorphosis, going through four life stages; egg, larva, pupa, and imago(adult). For example, Housefly, Beetle, Butterfly, moths, wasps, etc.
  • During the time of pupation, that the adult structures of the insect are formed whilst the larval structures are broken down.
  • Hence Pupa occurs in the life cycle of Housefly.
  • So, the correct answer is 'Housefly',
Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Immature stage of housefly is

  1. Caterpillar

  2. Nymph

  3. Grub

  4. Maggot.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Metamorphosis is defined as the series of changes that occur during the development of adult(mature stage) from the larva(immature stage). The order of metamorphosis in Housefly is Egg, larva or maggot, pupa, and adult.
  • The female housefly usually mates only once and stores the sperm for later use. She lays batches of about 100 eggs on decaying organic matter such as food waste, carrion, or faeces. They hatch after about 12 hours and the larvae, or maggots(immature stage), feed on the rotting organic material. A maggot passes through three larval stages and then forms a pupa or cocoon. The adult fly emerges from the cocoon. Houseflies typically develop from egg to adult(mature stage) within 10 days.
  • Hence Immature stage of a housefly is Maggot(larva).
  • So, the correct answer is 'Maggot'.
Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Maggot of Housefly is

  1. Pupa

  2. Larva

  3. Chrysalis

  4. Imago.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Metamorphosis is defined as the series of changes that occur during the development of adult from the larva. The order of metamorphosis in Housefly is Egg, larva or maggot, pupa, and adult.
  • The female housefly usually mates only once and stores the sperm for later use. She lays batches of about 100 eggs on decaying organic matter such as food waste, carrion, or faeces. These soon hatch into legless white mature larvae, known as maggots.
  • Hence Maggot of Housefly is larva.
  • So, the correct answer is 'Larva'.
Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

The order of metamorphosis in Housefly is

  1. Egg, nymph, pupa and adult

  2. Egg, larva, nymph and adult

  3. Egg, larva, pupa and adult

  4. Egg, pupa, larva and adult.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Metamorphosis is defined as the series of changes that occur during the development of adult from the larva.
  • The order of metamorphosis in Housefly is Egg, larva, pupa, and adult.
  • So, the correct answer is 'Egg, larva, pupa, and adult'.