Which of the following is correctly described for a common cockroach $(Periplaneta \text{ } americana)$?
- AOxygen is transported in the blood by hemoglobin.
- BThe nitrogenous excretory product is urea.
- CFood is ground by the mandibles and gizzard.
- DMalpighian tubules are excretory organs that arise from the rectum.
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Read the following statements and choose the correct option:
$(A)$ The cockroach nervous system consists of a series of fused,segmentally arranged ganglia.
$(B)$ Ganglia are joined in the cockroach by paired longitudinal connectives on the ventral side.
$(C)$ The nervous system is present on the dorsal side of the cockroach.
$(D)$ In the cockroach,the total number of ganglia is nine.
$(A)$ The cockroach nervous system consists of a series of fused,segmentally arranged ganglia.
$(B)$ Ganglia are joined in the cockroach by paired longitudinal connectives on the ventral side.
$(C)$ The nervous system is present on the dorsal side of the cockroach.
$(D)$ In the cockroach,the total number of ganglia is nine.
Difficult
View SolutionWhich of the following structures originates from the ectoderm?
Medium
View SolutionThe primary excretory product in a cockroach is .....
Medium
View SolutionWhich of the following organisms has "ommatidia" as the unit of its eye?
Medium
View SolutionDefine the following terms:
$(i)$ Vermicomposting
$(ii)$ Haemolymph
$(i)$ Vermicomposting
$(ii)$ Haemolymph
Easy
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