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 evs garbage in, garbage out preparation of compost sewage disposal solid waste management

The worm used in vermi-processing toilet is

  1. Redworm.

  2. Roundworm.

  3. Flatworm.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Vermi-processing toilets is a design of a toilet in which humans excreta is treated by earthworms and redworms.
  • In this process, human excreta is completely converted to cake like structures called vermi cakes by earthworms. Vermi cakes are used mostly in the soil as manure and fertilizers.
  •  Hence The worm used in the vermi-processing toilet is Redworm.
  • So, the correct answer is 'Redworm'.
Multiple choice zoology nervous system of man parts of the brain brain and its parts brain

Vermis is

  1. A tiny worm

  2. Cavity of medulla

  3. The large median lobe of cerebellum in mammals

  4. A portion of mid brain
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The cerebellum is made up of two lateral lobe and a large vermis lobe which is divided into nine segments. It is associated with the fastigial nucleus. It is concerned with the regulation of the regulation of the muscle tone for posture and locomotion. 

Hence, the correct answer is 'The large median lobe of cerebellum in mammals'

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

In the life history of cockroach (periplaneta), there is

  1. No Metamorphosis

  2. Incomplete metamorphosis

  3. Complete metamorphosis

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

Metamorphosis is the process of development of organisms after hatching or birth. Insects that go through three stages of change in their life cycle have an incomplete metamorphosis. The first stage is the egg. During this time, the insect will hatch into a form, called a nymph. The nymph is basically a small version of the adult insect. Once a nymph outgrows its exoskeleton it will go through a process called moulting which is to leave the old skin or exoskeleton behind. The new skin will harden and become the new exoskeleton. This will happen many times until the insect finally becomes an adult. So, the correct answer is option B.

Multiple choice biology locomotion and movements introduction to locomotion skeleton and joints movement in animals

Shedding of exoskeleton to replace it due to growth in body is called as

  1. Moulting

  2. Ecdysis

  3. Both A and B

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

  • Ecdysis is the moulting of the cuticle in many invertebrates of the clade Ecdysozoa.
  •  Since the cuticle of these animals typically forms a largely inelastic exoskeleton, it is shed during growth and a new, larger covering is formed.
  • The remnants of the old, empty exoskeleton are called exuviae. 
  • In arthropods, such as insects, arachnids and crustaceans, Moulting is the shedding of the exoskeleton (which is often called its shell), typically to let the organism grow. Hence, Shedding of the exoskeleton to replace it due to growth in the body is called ecdysis and moulting. 
So, the correct answer is 'Both A and B'.

Multiple choice evs wonderful world of bholu aquatic habitat life inside water animal and habitat

Acclimatisation refers to 

  1. The changes the colour of the organism

  2. The changes that help the organism to fly

  3. The changes taking place in the body of the organism due to the change in the surrounding

  4. The changes that help the organism to crawl/glide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Acclimatisation is the process by which an individual organism adjusts to a change in its environment, allowing it to maintain performance across a range of environmental conditions.

Multiple choice biology excretion to maintain homeostasis excretion in other organisms other excretory organ role of other organs in excretion

Select the correct option representing the excretory organs present in (i) earthworm , (ii) centipede , (iii) prawn , and (iv) flatworm. 

  1. (i) Malpighian tubules (ii) Flame cell (iii) Nelphridia (iv) Green gland

  2. (i) Flame cell (ii)Green gland (iii) Malpighian tubules (iv) Nephridia

  3. (i) Nephridia (ii)Malpighian tubules (iii) Green gland (iv) Flame cell

  4. (i)Green gland (ii) Nephridia (iii) Flame cell (iv) Malpighian tubules
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  1. In earthworm, carbon dioxide and nitrogenous wastes are the main waste materials. The carbon dioxide is excreted out from the body through its moist skin by the process of diffusion. The nitrogenous wastes are excreted out of the body by special excretory organs called nephridia.
  2. In centipede, the excretory system consists of a pair of Malpighian tubules that run from the midgut to the hindgut. Waste exits the body through the anus at the posterior end.
  3. Excretory organs of Prawn are known as green glands or antennal glands. They are called green glands for their color and antennal gland for the location at the base of the second antennae.
  4. Invertebrates such as flatworms use a nephridium as their excretory organ. At the end of each blind tubule of the nephridium is a ciliated flame cell. As the fluid passes down the tubule, solutes are reabsorbed and returned to the body fluids. 
So, the correct option is '(i) Nephridia (ii)Malpighian tubules (iii) Green gland (iv) Flame cell'. 
Multiple choice biology movement and locomotion in man locomotion in animals bones and movements muscle contraction

Cockroaches have an outer skeleton.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
An exoskeleton is the external skeleton that supports and protects an animal's body. Examples of animals with exoskeletons include insects such as grasshoppers and cockroaches, and crustaceans such as crabs and lobsters.
Cockroaches are winged insects found in nearly every part of the world. Like most other insects, cockroaches have an exoskeleton, meaning their skeleton is located on the outside of their bodies. They have three simple body parts: the head, thorax, and abdomen.
Hence, the answer is true.
Multiple choice biology respiration in living organisms breathing underwater respiration in other organisms respiration in organism

______ has no blood but can respire.

  1. Cockroach

  2. Hydra

  3. Snail

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

In animals, three main types of respiratory systems exist: respiration through the skin, respiration through the gills or respiration through internal air structures. Respiration through the skin, as in the Hydra, involves the passing of molecules into and out of the body via diffusion. Aquatic animals use gills, which are structures composed of tissues and blood vessels that extend from the body, for their respiration needs. Most terrestrial animals use internal air structures, such as lungs or tracheae, to respire. Cockroach, snail and earthworm has blood. 

Therefore, the correct answer is option B.

Multiple choice biology respiration in living organisms breathing underwater respiration in other organisms respiration in organism

Consider the following pairs about the organisms and their respective respiratory organ.
1. Earthworm - Moist skin of body
2. Mosquito- Tracheal system
3. Fish- Gills
4. Birds- Lungs

  1. 1, 2, 3 and 4

  2. 1, 3 and 4

  3. 2, 3 and 4

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

Earthworms have no special respiratory organs. Gases are exchanged through the moist skin and capillaries, where the oxygen is picked up by the hemoglobin dissolved in the blood plasma and carbon dioxide is released.
The basic respiratory system of insects consists of a series of rigid tubes, called as tracheae.
In most of the fishes, the respiration takes place through gills.
The birds have lungs, air sacs and a syrinx and their respiration requires two cycles to move a volume of air.
Therefore, the correct answer is option A.

Multiple choice biology control and co-ordination in plants and animals voluntary and involuntary movements impulse and its transmission coordination in human beings- nervous control
Which of the following layers you will find in the body wall of earthworm (from outside to inside)?

  1. Non-cellular cuticle, epidermis, circular muscles, longitudinal muscles, coelomic epithelium

  2. Cuticle, epidermis, longitudinal muscles, circular muscles, coelomic epithelium

  3. Non-cellular cuticle, epidermis, coelomic epithelium, circular muscles, longitudinal muscles

  4. Cuticle, epidermis, peritoneal muscles
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Externally the body wall of earthworm is covered by a thin non cellular cuticle below which lies the epidermis two muscle layers (circular and longitudinal) and innermost coelomic  epithelium.

Multiple choice evolutionary changes in heart transportation - the circulatory system

Alary muscles in cockroach are associated or connected with

  1. Trachea

  2. Heart

  3. Legs

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

Alary muscles in cockroach are associated or connected with Heart. These muscles are attached to both dorsal and tergum diaphragm. They are triangular in shape where in the pointed end is attached to the tergum and other end is attached to dorsal diaphragm. The alary muscles are responsible for the circulation of blood. Hence option B is correct.

Multiple choice evolutionary changes in heart transportation - the circulatory system

Heart of cockroach is

  1. Four chambered

  2. Ventral to gut

  3. Longitudinal and beaded

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

Cockroach has a 13 chambered longitudinal, thick, muscular and beaded heart. Each chamber receives oxygenated blood through slit like openings called ostia.