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Which among the following is not a sense organ of cockroach ?
In cockroach, the sense organs are antennae, eyes, maxillary palps, labial palps, anal cerci, etc. Unsegmented caudal styles are present in male cockroach only.
Complete the following statement by choosing the appropriate option:
The type of development in Periplaneta americana is ___________.
The development of P. americana is paurometabolous, meaning there is development through nymphal stage. The nymphs look very much like adults.
Which among the following is the correct location of spermatheca ?
A pair of spermatheca is present in female cockroach in the 6th segment which opens into the genital chamber.
Which among the following statement is incorrect with respect to ootheca of cockroach ?
Ootheca in female cockroach stores fertilised eggs.
Which among the following is incorrect with respect to development in cockroach?
The development of P. americana is paurometabolous, meaning there is development through nymphal stage. The nymphs look very much like adults. The nymph grows by moulting about 13 times to reach the adult form. The next to last nymphal stage has wing pads but only adult cockroaches have wings.
All of the following statements are correct with respect to female cockroach except :
The female reproductive system consists of two large ovaries, lying laterally in the 2nd – 6th abdominal segments. Each ovary is formed of a group of eight ovarian tubules or ovarioles, containing a chain of developing ova. Oviducts of each ovary unite into a single median oviduct (also called vagina) which opens into the genital chamber.
Complete the following statement:
Heart of cockroach consists of elongated muscular tube lying along _________ of thorax and abdomen.
Heart of cockroach consists of elongated muscular tube lying along mid dorsal line of thorax and abdomen.
Which among the following is not involved in excretion in cockroach ?
Excretion is performed by Malpighian tubules. Each tubule is lined by glandular and ciliated cells and not non-ciliated columnar cells.
They absorb nitrogenous waste products and convert them into uric acid which is excreted out through the hindgut. Therefore, this insect is called uricotelic. In addition, the fat body, nephrocytes and urecose glands also help in excretion.
Malpighian tubules in cockroach absorb nitrogenous waste products and convert them into _________ which is excreted out through the ___________.
A and B in above statement respectively are :
Malpighian tubules in cockroach absorb nitrogenous waste products and convert them into uric acid which is excreted out through the hindgut.
Tissue is
NCERT page number-100; para-1
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