(i) The common name of Periplaneta americana is the American cockroach.
(ii) Four pairs of spermathecae are present between sixth and the ninth segments. They help in receiving and storing the spermatozoa during copulation.
(iii) In a cockroach, the pair of ovaries is located between 12th and 13th abdominal segments.
(iv) In both sexes, the abdomen of a cockroach consists of ten segments.
(v) Malphigian tubules are excretory organs of cockroaches. They form a part of the alimentary canal.
NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:
(i) The common name of Periplaneta americana is the American cockroach.
(ii) Four pairs of spermathecae are present between sixth and the ninth segments. They help in receiving and storing the spermatozoa during copu...
Step-by-step explanation:
• (i) The common name of Periplaneta americana is the American cockroach
•
•
• (ii) Four pairs of spermathecae are present between sixth and the ninth segments
• They help in receiving and storing the spermatozoa during copulation
This question is important because it tests key concepts from the NCERT syllabus and is frequently asked in CBSE exams.
This question is based on core NCERT concepts explained in the chapter and should be revised thoroughly before exams.
Students often lose marks by skipping steps, writing incomplete explanations, or misunderstanding keywords used in the question.
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Student Discussion
the answer iii should be bet 2nd - 6th segment
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