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

Match list I and list II.

 
List I
(Cell types in the body of the Sycon) List II
(Characteristics/location of cells types of Sycon)
I. Pinacocytes 1. Cell having whip-like flagellum
II. Choanocytes 2. Cells covering the outer surface of the body
III. Scleroblasts 3. Large amoeboid cells with distinct nucleoli in nuclei
IV. Archaeocytes 4. Cells developing spicules
5. Cells constituting connecting tissues

  1. I - 2, II - 1, III - 4, IV - 3

  2. I - 5, II - 1, III - 2, IV - 4

  3. I - 1, II - 2, III - 5, IV - 3

  4. I - 3, II - 2, III - 1, IV - 4
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sponges belong to phylum porifera and are parazoans.

Multiple choice

Match the following:

 
Organisms Organs for excretion
a. Earthworm 1. Malpighian tubules
b. Cockroach 3. Kidneys
c. Cat 3. Nephridia

  1. a - 3, b - 2, c - 1

  2. a - 3, b - 1, c - 2

  3. a - 1, b - 3, c - 2

  4. a - 1, b - 2, c - 3

  5. a - 2, b - 1, c - 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option. In earthworms, the organ for excretion is nephridia. In cockroach, the organs for excretion are malpighian tubules. In cats, the organ for excretion is kidney.

Multiple choice

Flame cells are excretory organs of

  1. Leech

  2. Nereis

  3. Earthworm

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

Flame cells are specialized excretory cells found in Platyhelminthes, such as tapeworms and flatworms. They function to filter waste products from the body.

Multiple choice

The food in sponges is stored in

  1. Porocytes

  2. Choanocytes

  3. Thesocytes

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

In sponges (Porifera), food particles are ingested by choanocytes and then transferred to amoebocytes or thesocytes for storage and digestion.

Multiple choice

Which of the following members of porifera use spines for locomotion?

  1. Onychophorans

  2. Nematomorphs

  3. Priapulids

  4. Kinorhynchans

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

Kinorhynchans are segmented, limbless animals with a body consisting of a head, neck and a trunk of eleven segments. Unlike some similar invertebrates they do not have external cilia, but instead have a number of spines along the body, plus up to seven circles of spines around the head. These spines are used for locomotion.

Multiple choice

A love dart is a well known sharp, calcareous or chitinous dart created by hermaphroditic land snails. Which of the following snails creates and uses love darts?

  1. Periwinkle

  2. Whelk

  3. Bullacta exarata

  4. Escargot

  5. Otala lactea
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Otala lactea  is a large, edible species of air-breathing land snail. Archaeological recovery at the Volubilis illustrates prehistoric exploitation of O. lactea by humans. This snail creates and uses love darts as part of its courtship behaviour, prior to mating.

Multiple choice

Which of the following compounds is present in some scale insects ?

  1. Acrylic acid

  2. Carminic acid

  3. Carnitine

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

Carminic acid is a red glucosidal hydroxyanthrapurin that occurs naturally in some scale insects, such as the cochineal and the Polish cochineal. The insects produce the acid as a deterrent to predators. Carminic acid is the colouring agent in carmine.