Which of the following is not seen in hemichordates?
1. A tripartite body organization
2. Stomochord
3. Rudimentary notochord
4. Proboscis gland
In which of the following animals, the body is cylindrical and is composed of an anterior proboscis, a collar, and a long trunk?
1. Hemichordates
2. Urochordates
3. Cephalochordates
4. Vertebrate chordates
Match the organism in Column-I with its excretory structure in Column-II
|
Column-I |
|
Column-II |
(A) |
Cockroach |
(p) |
Nephridia |
(B) |
Earthworm |
(q) |
Proboscis gland |
(C) |
Balanoglossus |
(r) |
Kidney |
(D) |
Clarias |
(s) |
Malpighian tubules |
1. (A)(s),(B)(p),(C)(q),(D)(r)
2. (A)(s),(B)(p),(C)(r),(D)(q)
3. (A)(q),(B)(p),(C)(r), (D)(s)
4. (A)(s), (B)(q),(C)(r),(D)(p)
Which of the following set of animals belong the phylum hemichordate?
1. Balanoglossus, Saccoglossus
2. Salpa, Doliolum
3. Petromyzon, Myxine
4. Dentalium, Chaetopleura
1. | Echinodermata D | 2. | Ctenophora |
3. | Hemichordata | 4. | Coelenterata |
Match each item in Column I with one item in Column II and chose your answer from the codes given below.
Column I |
Column II |
I. Placoid Scales II. Ctenoid scales III. Ectoparasites IV. Proboscis gland |
1. Chondrichthyes 2. Osteichthyes 3. Hemichordata 4. Cyclostomata |
Codes:
I II III IV
1. 1 2 3 4
2. 2 1 4 3
3. 2 1 3 4
4. 1 2 4 3
Match the following group of organisms with their respective distinctive characteristics and select the correct option:
Organisms |
Characteristics |
||
(a) |
Platyhelminthes |
(i) |
Cylindrical body with no segmentation |
(b) |
Echinoderms |
(ii) |
Warm blooded animals with direct development |
(c) |
Hemichordates |
(iii) |
Bilateral symmetry with incomplete digestive system |
(d) |
Aves |
(iv) |
Radial symmetry with indirect development |
Options: | (a) | (b) | (c) | (d) |
1. | (iii) | (iv) | (i) | (ii) |
2. | (ii) | (iii) | (iv) | (i) |
3. | (iv) | (i) | (ii) | (iii) |
4. | (i) | (ii) | (iii) | (iv) |
Similarity between protochordata and hemichordata is
1. Presence of notochord.
2. Exclusively marine.
3. Dorsal hollow and single central nervous system.
4. Exclusively parasitic.