41. Which of the following is a fresh water sponge?
42. The kingdom Protista is primarily made up of organisms that are
43. Marsupial Kangaroo is
44. Which one of the following has a bilateral symmetry in its body organization?
45. Branch of biology which deals with the study of identification, nomenclature and classification of organisms is
46. Octopus belongs to the phylum
47. Octopus is
48. In coelenterates mesoderm gives rise to
49. It is the study of internal organs of organisms.
50. Their cells have a very well defined nucleus ,in which nuclear material (chromosomes or DNA) is enclosed in double nuclear membrane.
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