Choose the correct statement.
1. | All mammals are viviparous |
2. | All cyclostomes do not possess jaws and paired fins |
3. | All reptiles have a three-chambered heart |
4. | All Pisces have gills covered by an operculum |
In the case of Poriferans, the spongocoel is lined with flagellated cells called:
1. Oscula
2. Choanocytes
3. Mesenchymal cells
4. Ostia
Which of the following characteristic features always hold true for the corresponding group of animals?
(a) | Viviparous | (1) | Mammalia |
(b) | Possess a mouth with an upper and a lower jaw | (2) | Chordata |
(c) | 3- chambered heart with one incompletely divided ventricle | (3) | Reptilia |
(d) | Cartilaginous - Endoskeleton | (4) | Chondrichthyes |
1. a
2. b
3. c
4. d
Metagenesis refers to?
1. | The presence of different morphic forms |
2. | Alternation of generation between asexual and sexual phases of an organism |
3. | Occurrence of a drastic change in the form during post-embryonic development |
4. | Presence of a segmented body and parthenogenic mode of reproduction |
Select the Taxon mentioned that represents both marine and freshwater species:
1. Echinoderms
2. Ctenophora
3. Cephalochordata
4. Cnidaria
Consider the following features:
A: | Organ system level of organisation |
B: | Bilateral symmetry |
C: | True coelom with segmentation of body |
Select the correct option of animal groups that possess all the above characteristics:
1. | Annelida, Mollusca and Chordata |
2. | Annelida, Arthropoda and Chordata |
3. | Annelida, Arthropoda and Mollusca |
4. | Arthropoda, Mollusca and Chordata |