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
Endoskeleton of calcareous ossicles, external fertilization, adults shows radial symmetry, development indirect.
The above-given feature is true for:-
1. Echinus, Asterias
2. Pila, ophiura
3. Antedon, Aplysia
4. Pinctada, cucumaria
Match column I and column II with respect to animal and its common name
Column-I | Column-II | ||
(i) | Ancylostoma | (a) | Sea-hare |
(ii) | Aplysia | (b) | Sea anemone |
(iii) | Echinus | (c) | Sea urchin |
(iv) | Adamsia | (d) | Hookworm |
1. (i)→(a), (ii)→(b), (iii)→(c), (iv)→(d)
2. (i)→(d), (ii)→(b), (iii)→(a), (iv)→(c)
3. (i)→(d), (ii)→(c), (iii)→(a), (iv)→(b)
4. (i)→(d), (ii)→(a), (iii)→(c), (iv)→(b)
Which of the following is not an annelid?
1. Leech
2. Earhtworm
3. Sea mouse
4. Sea cucumber
Find out the correct match from the following table:-
|
Column-I |
Column-II |
Column-III |
(i) |
Radula |
Rasping organ |
Pila |
(ii) |
Hooks and suckers |
Taenia |
Annelida |
(iii) |
Tube feet |
Asterias; Dentalium |
Echinodermata |
(iv) |
Comb plates |
Pleurobrachia; Aurelia |
Ctenophora |
1. (i) only
2. (i) and (ii)
3. (iii) only
4. (ii) and (iii)
Excretory system is absent, sexes are separate,
fertilization is usually external this is correct for :
1. | 2. | ||
3. | 4. |
Which of these is not a coelenterate?
(1) Sea pen
(2) Sea fur
(3) Sea anemone
(4) Sea lily
Animals without excretory system, separate sexes,
and calcareous endoskeleton are applicable for
1. Chaetopeura
2. Ophiura
3. Limulus
4. Spongilla
Vertebrates and seastars may seen as different as two
animal groups can be, yet they share
1. The same type of body symmetry as adults.
2. A high degree of cephalization.
3. Certain developmental pattern, including the type
of coelom formation.
4. The presence of endoskeleton that include
cranium
The most distinctive feature of echinoderms is the presence of a water vascular system which helps in
(A) Locomotion
(B) Excretion
(C) Respiration
(D) Reproduction
1. (A) only
2. (B) & (C) only
3. (A), (B) & (C) only
4. (A), (B), (C) & (D)