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

Which of the following is probably NOT part of a cricket's typical diet? A mature House Cricket is roughly 2 centimeters in length. The female has an ovipositor, a long extension attached to the end of the abdomen and is used for depositing eggs in the soil.House Crickets have very prominent legs and two pair of wings .However, only the back pair is used for flying. There are a variety of habitats where House Crickets can be found like woodlands, suburbs, urban areas, buildings, ducts, siding etc. Although many crickets die off in the colder months, those that manage to find their way indoors can stay alive year round. Crickets become sexually mature between eight and twelve weeks after birth. After the male mates with the female, the female lays between 50 and 100 eggs in a soft surface and these eggs hatch in two weeks. Interestingly enough, the rate at which a cricket chirps is determined by the temperature outside. A Cricket chirps faster when it is warmer. As far as diet is concerned, House Crickets will eat just about anything including soft plant matter, insects, young crickets, and decomposing matter.

  1. Other Crickets

  2. Plant material

  3. Wood

  4. Insects

  5. -
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

House Crickets will eat just about anything including soft plant matter, insects, young crickets, and decomposing matter.

Multiple choice

Which of the following stages is NOT a part of incomplete metamorphosis?

  1. Egg

  2. Pupa

  3. Nymphy

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

Incomplete metamorphosis has three stages: egg, nymph, and adult. The pupa stage is only found in complete metamorphosis (like butterflies), which includes egg, larva, pupa, and adult. Grasshoppers and dragonflies undergo incomplete metamorphosis without a pupal stage.

Multiple choice

How long can a cockroach live without its head?

  1. 3 MINUTES

  2. 1 DAY

  3. 10 DAYS

  4. 3 WEEKS
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cockroaches can survive for weeks without their heads because they breathe through spiracles in their body segments rather than through their mouths.

Multiple choice biology biological diversity species, communities and ecosystems kingdom fungi monera, protista, fungi

Which of the following external characters help in differentiating a male cockroach from a female one? 

  1. Abdominal segments

  2. Anal cerci

  3. Anal styles

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

Anal style are a pair of thread like appendages arising from the 9th segment of the male cockroaches. They are characteristic feature of male cockroaches and help in copulation.

So, the correct option is 'Anal Styles'.

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

Select the correct match

  1. Human- kidney, sebaceous glands, tear glands

  2. Earth worm- pharyngeal, integumentary, septal nephridia

  3. Cockroach- malphigian tubules, enteric caeca

  4. Frog- kidney, skin, buccal epithelium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A) In humans, kidney and sebaceous glands are excretory organs but tear glands play no role in excretion.
B) According to the position in the body, the nephridia of earthworm are divided into three types :
1) Pharyngeal nephridia
2) Integumentary nephridia
3) Septal nephridia.
C) In cockroach, the malpighian tubules are major excretory organs but enteric caeca play role in digestion by the release of digestive enzymes at the junction of foregut and midgut.
D) In the frog, Kidney plays part in excretion, while Skin and buccal epithelium play important role in the respiratory process.
So, the correct match is 'Earthworm - Pharyngeal, integumentary, septal nephridia'.
Multiple choice evs mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease water borne diseases mosquito and human health

The mouth parts of Anopheles are adapted to

  1. Biting and chewing type feeding

  2. Piercing and sucking type feeding

  3. Chewing type feeding

  4. Sucking type feeding
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Female mosquito have mouthparts that pierce food items to enable sucking of internal fluids. In female mosquitoes, all mouthparts are elongated. The labium encloses all other mouthparts like a sheath. The labrum forms the main feeding tube, through which blood is sucked. Paired mandibles and maxillae are present, together forming the stylet, which is used to pierce an animal's skin. During piercing, the labium remains outside the food item's skin, folding away from the stylet. Saliva containing anticoagulants, is injected into the food item and blood sucked out, each through different tubes.

So, the correct option is B. ( Piercing and Sucking type )

Multiple choice zoology structural organization of animals structural organization of leech phylum annelida annelida structural organization of rabbit

Larva of Bonellia settling near proboscis of adult female develops into male due to.

  1. Substances secreted by proboscis

  2. Electrolytes in water

  3. Oxygen in environment

  4. Carbon dioxide in environment
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Baltzer showed that if a Bonellia larva settles on the seafloor, it becomes a female. However, should a larva land on a female's proboscis (which apparently emits chemical signals that attract the larva), it enters the female's mouth, migrates into her uterus, and differentiates into a male. Thus, if a larva lands on the seafloor, it becomes female; if it settles on a proboscis, it becomes male.

So, the correct answer is 'Substances secreted by proboscis'.
Multiple choice zoology structural organization of animals structural organization of leech phylum annelida annelida structural organization of rabbit

Botryoidal tissue is a characteristic of 

  1. Earthworm

  2. Ascaris

  3. Hirudinaria

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

In leeches, the botryoidal tissue is composed of two different cell types-granular botryoidal cells and flattened endothelial-like cells containing a brown pigment and may serve an excretory function. Hence, option C is correct answer.

Multiple choice types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

Which ones have open circulatory system
1. Ascidia 2. Cockroach 3. Earthworm 4. Prawn 5. Silver Fish 6. Snail 7. Squid.

  1. 2, 4, 6

  2. 1, 2, 4, 6

  3. 3, 4, 5, 7

  4. 2, 4, 5, 6

  5. 1, 2, 4, 6, 7.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Open circulatory systems are characteristic of arthropods (cockroach, prawn, silver fish) and most molluscs (snail). Ascidia (tunicates) and squid (cephalopods) have closed systems.

Multiple choice types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

An open circulatory system occurs in the

  1. Reptiles

  2. Birds

  3. Insects

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

An open circulatory system describes a system where blood and interstitial fluid (fluid found between cells in the body) are allowed to mix in an organism. Organisms that have an open circulatory system don't have true blood since it is mixed with other fluids. The blood in these organisms is defined as haemolymph. Two of the largest phyla in the world, arthropoda and mollusca, have an open circulatory system. Arthropods include most insects and sea organisms like crabs and lobsters. Molluscs are organisms with two shells that are hinged together. Examples include clams and oysters. However, not all molluscs have an open circulatory system. Two major members of the mollusc family, octopus and squid, have a closed circulatory system. 

Multiple choice types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

Circulatory system in cockroach is 

  1. Open

  2. Closed

  3. Semi-open

  4. Sometimes open and sometimes closed
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Insects have an open circulatory system, which differs in both structure and function from the closed circulatory system found in humans and other vertebrates. In an open system, blood (usually called haemolymph) flows freely within body cavities, where it makes direct contact with all internal tissues and organs.