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 evs our skeletal system and the skin bones and movements joints in the human body joints

Tongue like structure in periplaneta is

  1. Maxilla

  2. Hypopharynx

  3. Labium

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

The hypopharynx is an appendage or thickened fold on the floor of the mouth of many insects, that resembles a tongue. Thus, option B is correct.
The labium is a fused mouth part, which forms the floor of the mouth of an insect. Thus, option C is wrong.
The labrum is a structure corresponding to a lip, especially the upper border of the mouth parts of a crustacean or insect. Thus, option D is wrong.
The maxilla is the jaw or jawbone, specifically the upper jaw in most vertebrates. In humans, it also forms part of the nose and eye socket. Thus, option A is wrong.

Multiple choice biology animal behaviour ethology natural selection coordination in human beings- chemical control endocrine system in humans

Which of them is in tracheae group

  1. Crab-Centipede-Cockroach

  2. King crab-Scorpion-Housefly

  3. Spider-Peripatus-Mosquito

  4. Bedbug-Sandfly-Silkworm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bed bug ,sand fly silk worn are placed in tracheate  group of Arthropoda because they have trachae for  respiration Embryonic development of echinoderms shows a number of similarities with those of chordates .

Multiple choice biology human brain and sense organs introduction to sense organs eyes and their function the structure and function of the eye

Which of the following have "ommatidia" as unit of eye?

  1. Pheretima

  2. Housefly

  3. Pila

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

Compound eyes are the characteristic feature of insects. The compound eye of insects consists of many ommatidia, each of which is a separate visual unit that portrays each object into several broken pieces. This type of vision is called as mosaic vision. Among the given options, housefly is an insect and has ommatidia as a unit of an eye. Pheretima (annelid) and pila and sepia (molluscs) do not have compound eyes. 

So, the correct answer is option B.

Multiple choice biology diseases and hygiene diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Bladderworm is the common name of ______________.

  1. Taenia solium

  2. Ancylostoma duodenale

  3. Enterobius vermicularis

  4. Trichinella spiralis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Taenia solium, is the pork tapeworm, a tapeworm belonging to the cyclophyllid cestode family .

The central space is filled with fluid like a bladder, hence it is also called bladder worm

Multiple choice evs science of kitchen balanced diet and malnutrition assimilation of food components and importance of food skeletal system and muscles assimilation of food and egestion busy at work - our internal organs

Bilious is

  1. Greenish vomit

  2. Yellowish vomit

  3. Brownish vomit

  4. Blackish vomit
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Bilious is greenish vomit. The green colour is due to the presence of bile which is formed in the liver and stored in the gall bladder. Further, it is secreted in the duodenum. When this bile get mixed with the food and comes out with vomiting, it gives greenish appearance. It may be due to bowel obstruction or other health problems. So, the correct option is A.
Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

Which of the following is present at the anterior end of Balanoglossus?

  1. Proboscis

  2. Collar

  3. Hepatic region

  4. Brachiocephalic region
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
In longitudinal section of the anterior region of Balanoglossus, three parts are visible i.e., proboscis, collar, and trunk. Among these, the proboscis is present in the anterior end. It is almost round in shape. Proboscis helps in burrowing through the sand. 
So, the correct answer is 'Proboscis'.
Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

The body of acorn worms can be divided as

  1. Anterior proboscis

  2. Intermediate collar

  3. Posterior trunk

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Acorn worms is a hemichordate. They are closely related to echinoderms. They are solitary worm-shaped organisms. They can be traced in burrows and are deposit feeders, but some species are pharyngeal filter feeders.

The body of acorn worms is worm-shaped and divided into an anterior proboscis, an intermediate collar, and a posterior trunk. The proboscis is a muscular and ciliated organ used in locomotion and in the collection and transport of food particles. The mouth is located between the proboscis and the collar. The trunk is the longest part of the animal.
So, the correct answer is option D.

Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

Many acorn worms are known to produce

  1. Proteins

  2. Casein

  3. Phenol

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

Acorn worms is a hemichordate. They are closely related to echinoderms. They are solitary worm-shaped organisms. They can be traced in burrows and are deposit feeders, but some species are pharyngeal filter feeders. Many are well known for their production and accumulation of various halogenated phenols and pyrroles. 

So, the correct answer is option C.

Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

In Balanoglossus 

  1. Sexes are united and fertilization is external

  2. Sexes are separate and fertilization is external

  3. Sexes are separate and fertilization is internal

  4. Sexes are united and fertilization is internal
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Balanoglossus is a hemichordate acorn worm. It is the connecting link between invertebrates and vertebrates. It is basically a bottom-dwelling marine worm. It is tubicolous, that is, lives inside U-shaped burrows or tubes in the sand.  In Balanoglossus, the sexes are separate and prominent sexual dimorphism does not exist and fertilization is external, that is, it takes place outside the body of the organism.

So, the correct answer is 'Sexes are separate and fertilization is external.'.

Multiple choice zoology diversity in living world hemichordata phylum hemichordata chordates and hemichordates

The roof of oral hood in Amphioxus show the presence of Hatschek's pit which is responsible for the secretion of 

  1. Bile

  2. Saliva

  3. Mucus

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

The roof of the oral hood in Amphioxus show the presence of Hatschek's pit which is responsible for the secretion of mucus. This mucus secretion helps to entrap food particles present in the water.

So, the correct answer is 'Mucus'.