An animal with the following body wall organization will not have:
1. Cephalization
2. Three germ layers
3. Bilateral symmetry
4. A complete digestive tract
Consider the following statements:
I. Platyhelminths are acoelomates and use protonephridia as excretory structures.
II. Aschelminthes are pseudocoelomates and have bilateral symmetry.
III. Adult echinoderms show radial symmetny and exhibit deuterostome type embryonic development.
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
Consider the following statements:
Chordates-
I. Possess a solid, single and ventral nerve cord
II. Have pharyngeal gill slits at some point during their development.
III. Have post-anal tail
Which of the above statements are true?
1 I and II only
2. I and III only
3. II and III only
4. I, II and III
Match each item in Column I with one item in Column Il and chose your answer from the codes given below:
Column I Column II
(animal) (phylum)
I. Loligo 1. Mollusca
II. Ophiura 2. Echinodermata
III. Beroe 3. Cnidaria
IV. Adamsia 4. Ctenophora
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 each item in Column I with one item in Column II regarding and choose your answer from the codes given below :
Column I |
Column II |
||
I. |
Nereis |
1. |
Gills |
II. |
Prawn |
2. |
Parapodia |
III. |
Earthworm |
3. |
Skin |
IV. |
Cockroach |
4. |
Trachea |
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 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
In case of poriferans, the spongocoel is lined with flagellated cells called
1. ostia
2. oscula
3. choanocytes
4. mesenchymal cells
Choose the correct statements.
1. All mammals are viviparous
2. All cyclostomes do not possess jaws and paired fins
3. All reptiles have a three-chambered heart
4. All Pisces have gills covered by an operculum
Which of the following characteristic features always holds true for the corresponding group of animals?
1. | Viviparous | Mammalia |
2. | Possess a mouth with an upper and a lower jaw | Chordata |
3. | 3-chambered heart with one incompletely divided ventricle | Reptilia |
4. | Cartilaginous – endoskeleton | Chondrichthyes |
Which of the following features is not present in the phylum – Arthropoda?
(1) Metameric segmentation
(2) Parapodia
(3) Jointed appendages
(4) Chitinous exoskeleton