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Structural Organisation in Animals — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYStructural Organisation in Animals3 Marks
Question
While teaching in a classroom, teacher told students that cockroaches are omnipresent and they are useful as well as harmful for mankind. Ram found this interesting and asked many questions regarding the topic to his teacher.
  1. Which features enable the cockroaches to thrive in almost all places?
  2. How is it useful to humans?
  3. What are the negative impacts of its presence in our surroundings?
  4. What values does the Ram possess as a student?
✓

Answer

  1. Cockroach has following important features which enable it to survive in variety of habitats:
  1. Flattened body to easily slip into narrow spaces.
  2. Shape of legs allows swift running possible in confined places.
  3. Nocturnal habit helps in protection from enemies.
  1. Cockroaches are eaten by the people of South American countries and Myanmar (Burma). These are part of food chain as many amphibian, birds, lizards and rodent feed on them.
  2. Negative impacts of presence of cockroach in our surroundings are:
  1. Cockroaches are pests which damage household materials including clothes, paper, shoes, etc.
  2. Contaminate our food by their excreta making it unpalatable.
  1. Ram is very attentive, curious, inquisitive, and is aware of is surroundings.

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