Choose the correct statement.

  • All Pisces have gills covered by an operculum.
  • All mammals are viviparous.
  • All cyclostomes do not possess jaws and paired fins.
  • All reptiles have a three-chambered heart.

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Match Column-I with Column-II for housefly classification and select the correct option using the codes given below :

Column-I Column-II

a. Family (i) Diptera

b. Order (ii) Arthropoda

c. Clsass (iii) Muscidae

d. Phylum (iv) Insecta

Which of the following sets of diseases is caused by bacteria?

The highest DDT concentration in aquatic food chain shall occur in

A lake which is rich in organic waste may result in

Which of the following National Parks is home to the famous musk deer or hangul?

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Choose the correct statement.
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