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In Periplaneta americana, sclerites are fused together by a thin, flexible membrane known as
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Important Questions on Structural Organisation in Animals
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In the abdomen of Cockroach, the ventral nerve cord is absent in the following segments
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Which of the following features is used to identify a male cockroach from a female cockroach?
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The following are the joints of each leg of a cockroach
I) Tibia
II) Coxa
III Tarsus
IV) Femur
V) Trochanter
Arrange these in order.
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Thermoreceptor sensillae of cockroach are present on
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Identify the correct statement with reference to the nervous system of the cockroach:
a) The nervous system of cockroach is called as autonomic nervous system.
b) There are thoracic and abdominal ganglion.
c) Sub-oesophageal ganglion controls the movements of mouth parts.
d) The abdominal ganglion innervates the abdominal segment.
The correct answer is
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Identify the correct sequence of flow of circulation of blood in Periplaneta americana
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The cells of fat body of cockroach which contain symbiotic bacteria are:
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In male cockroaches, sperms are stored in which part of the reproductive system?
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The terga, sterna and pleura of cockroach body are joined by:
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In cockroach, if the sub-oesophageal ganglion is damaged, which part of the cockroach is affected?
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Match the following:
| Cells of corpora adiposa of cockroach | Function | ||
| Trophocytes | Symbiotic bacteria | ||
| Mycetocytes | Store uric acid | ||
| Oenocytes | Intra cellular digestion | ||
| Urate cells | Secrete lipids | ||
| Store food |
The correct match is
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In cockroach, ootheca around the eggs is secreted by
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Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth:
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In cockroach, thermoreceptor sensillae are present on
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Which of the following features is not present in Periplaneta americana?
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Match the following columns with reference to cockroaches and select the correct option:
| Column | Column | ||
| (a) | Grinding of the food particles | (i) | Hepatic caeca |
| (b) | Secrete gastric juice | (ii) | segment |
| (c) | pairs | (iii) | Proventriculus |
| (d) | Anal cerci | (iv) | Spiracles |
| (v) | Alary muscles | ||
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In cockroach, identify the parts of the foregut in correct sequence:
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Cockroach has 'superposition vision'. This type of vision has the following characteristic features 'EXCEPT'
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Triangular joint in the leg of Periplaneta is
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If the head of cockroach is removed, it may live for few days because
