67. Which of the following are not found in sponges? A. oscula. B. Spong ocoels.

Question

67. Which of the following are not found in sponges? A. oscula. B. Spong ocoels. C. Cnidocytes. D. Spicules. E. Am 68. A radially symmetrical animal that has embryonic germ layers belongs to which Porifera(Parazoa) Cnidaria. Platyhelminthes. Ashelminthes. Echinodermata. 69. Which class of the Phylum cnideria occurs as only a Polyp? Hydrozoa. Scyphozoa. Anthozoa. Only A and Care correct. A, B, and C are correct. 70. All of these characteristics are found in the phylum Porifera ExCEPT Choanocytes. Nematocysts. Nerves. Flame cells. B, C and D 71 Pores on the leaf surface that function in gas exchange are called. hairs. xylem cells. phloem stomata. sclereid

Explanation / Answer

Ans 67:Cnidocytes are present in cnidarians so option C

Ans 68:Echinodermata i.e. E

Ans 69: Hydrozoa and Anthozoa both occurs as only a polyp so option D.

Ans 70: Nematocysts, Nerves and Flame cells :are not the characteristic so option E,

Ans 71: Gas exchange through leaf is done by stomata so option D is correct.

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