In which of the following animals the adults have pentamerous radial symmetry while their larvae are bilaterally symmetrical?
(1) Arthropods
(2) Molluscs
(3) Echinoderms
(4) Annelids
Botryoidal tissue is found in
(1) hirudina
(2) polychaeta
(3) oligochaeta
(4) all of these.
Which of the following is an egg laying mammal?
(1) Kangaroo
(2) Platypus
(3) Penguin
(4) Whale
Class Crustacea has following features:
(1) Cephalothorax, book lungs, chitinous exoskeleton
(2) Head and thorax, biramous appendages, book lungs
(3) Head and thorax, book lungs, chitinous exoskeleton
(4) Cephalothorax, biramous appendages, gills
Which of the following is wrongly matched?
(1) Haemoglobin in mammals – RBC
( 2) Haemozoin – Plasmodium cytoplasm
(3) Haemocyanin – leeches
(4) Haemoglobin dissolved in blood – Pheretima
Which of the following is correct about nematocyst?
(1) It can be re-used.
(2) It is excretory organ in arthropods
(3) It is ejected on contact and pierce the prey
(4) None of these
Ambulacral grooves are absent in the living forms of the Class
(1) Crinoidea
(2) Asteroidea
(3) Ophiuroidea
(4) Echinodermata
Which of the following Phyla are included in Enterozoa?
(1) Annelida, Mollusca, Porifera
(2) Echinodermata, Hemichordata, Porifera
(3) Mollusca, Arthropoda, Hemichordata
(4) Porifera, Mollusca, Arthropoda
Hydra receives impulses and stimuli through
(1) nerve net
(2) nematocytes
(3) sensory cells
(4) flame cells
Which one feature is common to leech, cockroach and scorpion?
(1) Nephridia
(2) Ventral nerve cord
(3) Cephalisation
(4) Antenna