During its life cycie, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stages respectively
metacercaria and ceracaria
miracidium and metacercaria
redia and miracidium
cercaria and redia
B.
miracidium and metacercaria
Liver fluke (Fasciola hepatica) is a digenetic endoparasite, i.e., its life cycle completes within two hosts.
The primary host is sheep and the secondary or intermediate host is freshwater gastropod, snail. It infects its intermediate host at miracidium stage and its primary host at metacercaria stage.
Gemmule formation in sponges are useful in
asexual reproduction
sexual reproduction
parthenogenesis
parthenocarpy
Sycon belongs to a group of animals which are best described as
multicellular with a gastrovascular system
multicellular having tissue organisation, but no body cavity
unicellular or acellular
multicellular without any tissue organisation
Which one of the following animals lay eggs yet the female secretes milk?
Bat
Kangaroo
Platypus
Ostrich
