- The group of triploblastic animals with jointed appendages, bilateral symmetry, having open circulatory
system and possess antennary glands or green glands and Malpighian tubules as excretory organs.
(a) Name the phylum to which they belong.
(b) Name the subphylum which contains their fossil representatives.
(c) Give three examples of the class having three pairs of legs and usually two pairs of wings. - Peristomium in Nereis is composed of
(a) one segment (b) two segments
(c) three segments (d) six segments. - The name of the larva of Nereis is
(a) trochophore (b) bipinnaria
(c) zoea (d) cercaria. - In earthworm, the spermathecae are used for
(a) development of ovum (b) development of sperm
(c) storing spermatozoa (d) development of zygote. - Saliva of leeches contain an anticoagulant called
(a) haemoglobin (b) hirudin
(c) haparin (d) histamine. - Presence of coelom and metamerism are the most important
characters of
(a) helminthes (b) poriferans
(c) annelids (d) coelenterates. - Typhlosole is present in the intestine of
(a) Nereis (b) Hirudinaria
(c) Pheretima (d) Aphrodite. - The clitellum in a mature Pheretima is a thick girdle which is
(a) glandular in nature and surrounds segments 16-18
(b) non-glandular in nature and surrounds segments 16-18
(c) glandular in nature and surrounds segments 14-16
(d) non-glandular in nature and surrounds segments 14-16. - Heteronereis stage is
(a) transformation of sexual individual into asexual
(b) sexually immatured worm with two regions atoke and
epitoke
(c) sexually matured worm with two regions atoke and
epitoke
(d) all of the above. - In which of the following classes of Annelida, clitellum is
absent?
(a) Hirudinea (b) Polychaeta
(c) Oligochaeta (d) All of these - Which of the following assists in the locomotion of the organism
stated?
(a) Clitellum of Pheretima
(b) Pedicellaria of starfish
(c) Trichocysts of Paramecium
(d) Posterior sucker of Hirudinaria - The nephridia in earthworm are analogous to
(a) nematoblasts of Hydra (b) flame cells of Planaria
(c) gills of prawn (d) trachea of insects. - Chitin is a polysaccharide found in the exoskeleton of
(a) prawn (b) insects
(c) crabs (d) all of these. - Antennary glands of crustaceans are meant for
(a) respiration (b) neurosecretion
(c) excretion (d) olfaction. - Which one of the following features is possessed by crustaceans
and not by insects?
(a) Paired limbs (b) Two pairs of antenna
(c) Chitinous exoskeleton (d) Bilateral symmetry - Bilateral symmetry, metameric segmentation, coelom and open
circulatory system characterise which of the following phyla?
(a) Annelida (b) Mollusca
(c) Arthropoda (d) Echinodermata - Which of the following is not an insect?
(a) Termite (b) Ant
(c) Mosquito (d) Spider - Most of the insects excrete uric acid because
(a) most of them are aquatic
(b) most of them are terrestrial
(c) the circulatory system is open
(d) the blood is colourless. - Match Column I with Column II and select the correct option.
Column I Column II
A. Polychaeta (i) Pheretima
B. Oligochaeta (ii) Polygordius
C. Hirudinea (iii) Nereis
D. Arachiannelida (iv) Hirudinaria
ff
(ff)
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