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
(1) |
Jelly fish |
Aurelia |
Scyphozoa |
(2) |
Paddle worm |
Chaetopterus |
Polychaeta |
(3) |
Cray fish |
Oniscus |
Crustacea |
(4) |
Acorn worm |
Balanoglossus |
Enteropneusta |
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
Collar cells are present in the members of which phyla
1. Echinodermata
2. Coelenterata
3. Ctenophora
4. Porifera
Fragmentation is a method of asexual repoduction in
(1) Annelida
(2) Platyhelminthes
(3) Aschelminthes
(4) Porifera