An important characteristic that Hemichordates share with Chordates is:
| 1. | Ventral tubular nerve cord |
| 2. | Pharynx with gill slits |
| 3. | Pharynx without gill slits |
| 4. | Absence of notochord |
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) |
All vertebrates are chordates but all chordates are not vertebrates, why?
| 1. | Notochord is replaced by a vertebral column in the adults of some chordates. |
| 2. | The ventral hollow nerve cord remains throughout life in some chordates. |
| 3. | All chordates possess a vertebral column. |
| 4. | All chordates possess notochords throughout their lives. |
Read the following statements.
| (a) | Metagenesis is observed in Helminths. |
| (b) | Echinoderms are triploblastic and coelomate animals. |
| (c) | Round worms have organ-system level of body organization. |
| (d) | Comb plates present in ctenophores help in digestion. |
| (e) | Water vascular system is characteristic of Echinoderms. |
Choose the correct answer from the options given below:
1. (a), (d) and (e) are correct
2. (b), (c) and (e) are correct
3. (c), (d) and (e) are correct
4. (a), (b) and (c) are correct
| 1. | Bronchioles and fallopian tubes |
| 2. | Bile duct and bronchioles |
| 3. | Fallopian tubes and pancreatic duct |
| 4. | Eustachian tube and salivary duct |
Which of the following statements wrongly represents the nature of smooth muscle?
| 1. | Communication among the cells is performed by intercalated discs. |
| 2. | These muscles are present in the wall of blood vessels. |
| 3. | These muscles have no striations. |
| 4. | They are involuntary muscles. |
If the head of the cockroach is removed, it may live for a few days because:
| 1. | The cockroach does not have a nervous system |
| 2. | The head holds a small proportion of the nervous system while the rest is situated along the ventral part of its body |
| 3. | The head holds 1/3rd of the nervous system while the rest is situated along the dorsal part of its body |
| 4. | The supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen |
Prosthetic groups differ from co-enzymes, in which:
| 1. | they require metal ions for their activity. |
| 2. | they (prosthetic groups) are tightly bound to apoenzymes. |
| 3. | their association with apoenzymes is transient. |
| 4. | they can serve as co-factors in a number of enzyme-catalyzed reactions. |
Which of the following glucose transporters is insulin-dependent?
1. GLUT IV
2. GLUT I
3. GLUT II
4. GLUT III
Identify the statement which is incorrect.
| 1. | Sulphur is an integral part of cysteine. |
| 2. | Glycine is an example of lipids. |
| 3. | Lecithin contains a phosphorus atom in its structure. |
| 4. | Tyrosine possesses an aromatic ring in its structure. |
© 2026 GoodEd Technologies Pvt. Ltd.