Question

Read the following statements about cockroach i) A ring of 6 - 8 blind tubules called gastric caecae present at the junction of foregut and midgut. ii) The haemolymph is composed of colourless plasma and haematocytes iii) Phallic glands are seen in the excretory system of a male cockroach iv) In a cockroach, pheromone is helpful in attracting the opposite sex Of the above statements 1) Only two are false 2) Only one is false 3) Only three are false 4) Four are false

Answer 1

Answer:

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Answer 2

Answer:

Option i, ii and iv are correct.

Explanation:

• A ring of six to eight  blina tubules present on the junction of foregut and midgut is called hepatic caecae which secrete digestive juice.

• The blood of cockroaches which belong to the phylum arthropod is colourless because of the absence of any pigment that is called haemolymph.

• A phallic gland is related to the male reproductive gadget of the Periplaneta.

•  In a long-variety signal, the intercourse hormone pheromone is launched with the aid of using lady cockroach to draw the male cockroach.

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