Alternation Of Generation

The following are the features associated with Cnidaria. I. Radial symmetry II. The presence of gastrovascular cavity III. Animals are in either of the two forms -polyp and medusa or both. IV. Alternation of generations in their history WHich of the above are true of Metridium ?

Which of the following character correctly matches with the animal? (A) A viviparous animal -Aptenodytes (B) A fish possessing a poison sting - Torpedo (C) Animal, which exhibits alternation of generation - Obelia (D) Oviparous animal with mammary gland - Kangaroo

Consider the following statements. I. Kingdom Plantae includes eukaryotic, autotrophic, chlorophyll containing organisms. II. It includes algae bryophytes, pteridophytes, gymnosperms, but not angiosperms. III. Plants show alternation of generation [between haploid gametophytic (n) phase and diploid sporophytic (2n) phase]. Which of the statement given above are correct?

Read the following statements and select the true ((T)) or false ((F)) statement . A. The notochord is an ectodermal derived rod-like structure in chordates. B. Platyhelminthes are triploblastic and pseudocoelomate animals. C. The alternation of generation in Obelia is called Metagenesis . D. In ctenophora , only sexual mode of reproduction is observed.

Give an example for each of the following A viviparous animal (b) A fish possessing a poison sting (c ) A fish possessing an electric organ (d) An organ, which regulates buoyancy (e) Animal, which exhibits alternation of generation (f) Oviparous animal with mammary of gland

Some characters of algae are given below a. Floridean starch b. Sulphated phycocolloids in cell wall c. Alginic acid d. Trumpet hypha e. Haplodiplontic life cycle f. Isomorphic alternation of generation g. Fucoxanthin h. Phycoerythrin i. Zygotic meiosis j. Tow anterior flagella Which of the given set of characters belongs to Laminaria ?