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
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Bristles
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Trachein
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Taenidia
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Commissural tracheae
C
Correct answer
Explanation
Taenidia present in trachea prevent the collapse of trachea.
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Closed phase
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Open phase
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Flutter phase
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Rest phase
B
Correct answer
Explanation
Rapid release of CO2 in the atmosphere takes place in the open phase. During the open phase, spiracular muscles relax and the spiracles open completely.
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Muscular system
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Nervous system
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Hormonal system
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Both muscular and nervous systems
B
Correct answer
Explanation
In cockroaches, respiratory movements are controlled and coordinated by the nervous system.
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Inspiration is a passive process.
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Expiration is a passive process.
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Taenidiae are absent in tracheoles.
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Atrium leads into trachea.
B
Correct answer
Explanation
This statement is incorrect. Expiration is an active process.
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Dorsal longitudinal tracheal trunks (DLTT)
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Ventral longitudinal tracheal trunks (VLTT)
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Lateral longitudinal tracheal trunks (LLTT)
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Both Lateral and Dorsal longitudinal trunks
C
Correct answer
Explanation
The lateral longitudinal tracheal trunks are the longest tracheal trunks.
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To consume more oxygen
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To conserve water
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To conserve CO2
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Steady flight in the air
B
Correct answer
Explanation
Cockroaches have adapted to tracheal breathing in order to conserve water. Tracheae do not just carry air inwards to the cells, they also carry water out of the cells. The hypothesis is that when cockroaches are resting and have a lower oxygen requirement, they close the spiracles in order to conserve water.
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Tergo-coxal muscles
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Tergo-sternal muscles
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Coral depressor muscles
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Longitudinal tergal muscles
B
Correct answer
Explanation
In a cockroach, the muscles which help in respiration are called tergo-sternal muscles.
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Basement membrane
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Middle layer
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Intima
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Taenidia
C
Correct answer
Explanation
Intima is the inner chitinous layer of trachea.
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Perineustic
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Holopneustic
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Hemineustic
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Amphineustic
B
Correct answer
Explanation
In holopneustic arrangement, there are 10 pairs of spiracles with 1 mesothoracic, 1 metathoracic and 8 abdominals. Such an arrangement is found in a cockroach.
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Abdominal spiracles open and thoracic spiracles close.
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Thoracic spiracles open and abdominal spiracles close.
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Both thoracic and abdominal spiracles open.
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Both thoracic and abdominal spiracles are partially open.
B
Correct answer
Explanation
During inspiration, thoracic spiracles are kept open and the abdominal spiracles are kept closed.
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Cysts
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Buds
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Gemmules
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Conidia
C
Correct answer
Explanation
The internal buds formed in sponges are called gemmules.
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malpighian tubules
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glomerulus
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sponge-like kidneys
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flame cells
C
Correct answer
Explanation
Molluscs have one or two pairs of renal organs such as sponge-like kidneys.
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dermal branchiae
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malpighian tubules
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proboscis gland
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green glands
C
Correct answer
Explanation
Proboscis glands are the excretory organs of hemichordates.
C
Correct answer
Explanation
Animals such as sponges and hydras do not possess any circulatory system. The water in which they live acts as circulatory fluid for them. This is because it brings food and oxygen into their bodies.
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Prawn
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Cockroach
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Planaria
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Earthworm
B
Correct answer
Explanation
The excretory organs of cockroaches are malpighian tubules.