Bats belong to which class Mammalia Aves Reptilia Agnatha Al
     Bats belong to which class?  Mammalia.  Aves.  Reptilia  Agnatha.  All birds belong to the class:  Mammalia.  Amphibia.  Aves  Chondrichthyes  Sharks belong to the class:  Chondrichthyes.  Agnatha.  Osteichthyes.  Echinodermata.  The animal phylum with the most number of species is:  Mollusca.  Arthropoda.  Annelida.  Platyhelminthes.  Which of the following is not a major characteristic of  dorsal hollow nerve cord.  notochord.  gill slits.  vertebral column.  A perch belongs to the class:  Chondrichthyes.  Osteichthyes.  Agnatha.  Amphibia.  All of the following have exoskeletons EXCEPT:  beetles.  earthworms.  lobster.  centipedes.  An earthworm belongs to the phylum:  Mollusca.  Chordata.  Arthropoda.  Annelida. 
  
  Solution
7.Answer is option A.
Because bats are not aves,reptilia or agnatha,so option B,C,D are wrong hence, option A is correct.
8.Answer is option C.
Because birds are not mammalia,amphibia or chondricthyes so option A,B,D are wrong, hence option C is correct.
9.Answer is option A.
Because sharks are not agnatha,osteicthyes,echinidermata so option B,C,D is wrong,hence option A is correct.
10.Answer is option B.
The phylum in which most number of species belongs to is arthropoda hence option B is correct and option A,B,D is wrong.

