Retrogressive metamorphosis occurs in

(1) Hemichordata

(2) Cephalochordata

(3) Urochordata

(4) Vertebrata

Some salient features and phyla of organisms are given below. Select the option which shows the correct combination of organism, its phylum and salient features.

Select the correct statement regarding reproduction.

(1) Mating in dogs is synchronised with lunar cycle.

(2) Salamanders always have internal fertilisation.

(3) In Trygon, the male introduces sperms into female through a modified pelvic fin.

(4) Catla has internal fertilisation.

Select the option that correctly matches characteristic features with the group of three animals.

(1) Skeleton of spicules − Sycon, Adamsia, Spongilla

(2) Excretion by flame − Taenia, Fasciola, Ancylostoma

(3) Mouth contains radula −  Dentalium, Octopus, Ophiura

(4) Jointed appendages −  Limulus, Apis, Laccifer

Among which of the animals urinary bladder is absent?

(1) Frog

(2) Crow

(3) Ostrich

(4) Camel

Gemmule formation is a common mode of asexual reproduction in

(1) Paramecium

(2) Hydra

(3) sponges

(4) yeast

Identify the incorrect match from those given below

Which of the following is common among mammals?

(1) They do not moult

(2) They have seven cervical vertebrae

(3) They are carnivores

(4) They have ventral nerve cord

Water transport system or canal system is a characteristic feature of which animal?

1. Spongilla

2. Hydra

3. Asterias

4. Echinus

Fresh water sponge is the common name of

(1) Hydra

(2) Sycon

(3) Spongilla

(4) Euspongia