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NEET UG BIOLOGY MCQ: STRUCTURAL ORGANISATION IN ANIMALS

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Which of the following is correct for the circulatory system of cockroach?

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Correct option: D

It is present on the dorsal side and it has ten abdominal and three thoracic units of heart

Option D (It is present on the dorsal side and it has ten abdominal and three thoracic units of heart) is correct because the cockroach heart is located dorsally and consists of 13 chambers: 10 in the abdomen and 3 in the thorax.

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Simple epithelium is a tissue in which the cells are In addition to the Malpighian tubules, excretion of the waste products in cockroach occurs by

\underline {\,\,\,\,\,\mathrm{A}\,\,\,\,\,\,\,}

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\underline {\,\,\,\,\,\mathrm{B}\,\,\,\,\,\,\,}

:- Read the following 4-statements (i – iv) and accordingly mark the option that has both correct statements.
i) Cardiac fibres are branched with one or more nuclei.
ii) Smooth muscles are unbranched and cylindrical.
iii) Striated muscles can be branched or unbranched.
iv) Involuntary muscles are non-striated. The ciliated columnar epithelial cells in humans are known to occur in The outermost wall of spermatophore of cockroach is composed of the secretions of