Class Osteichthyes

Q.

Differentiate between class Chondrichthyes and class Osteichthyes.

Q. How many of the following features mentioned below belong to Osteichthyes?

1. Presence of air bladder
2. Two chambered heart
3. Placoid scales
4. Claspers
5. Oviparous
6. External fertilisation

1. Five
2. Four
3. Three
4. Six

Q. Match the following.

Column I	Column II
A. Exocoetus	I. Rohu
B. Pterophyllum	II. Sea horse
C. Labeo	III. Angelfish
D. Hippocampus	IV. Flying fish

1. A-I, B-II, C-III, D-IV
2. A-IV, B-III, C-I, D-II
3. A-III, B-IV, C-I, D-II
4. A-IV, B-III, C-II, D-I

Q.

What is special about Agnatha fish?

Q. The gills are not covered in while have gills covered by operculum.

1. Echinoderms
2. Osteichthyes
3. Chondrichthyes
4. Platyhelminthes

Q.

How do you pronounce Chondrichthyes?

Q.

Copulatory pad in frog is present on the first digit of:

1. forelimbs in males

2. forelimbs in females

3. hindlimbs in males

4. hindlimbs in females

Q.

Describe the general characters of class Reptilia with examples.

Q. The fish which shows parental care is

1. Labeo
2. Scoliodon
3. Gambusia
4. Hippocampus

Q. A functional mammary gland is characteristic of all

Q.

Name the respiratory organ of phylum mollusca.

Q. Which of the following statement(s) is correct about Chondrichthyes?
(I) They have two chambered heart, with one auricle and one ventricle
(II) They are poikilothermic
(III) They have separate sexes, males bear claspers
(IV) They have bony endoskeleton

1. II, III, IV
2. I, III, IV
3. I, II, III
4. I, II, III, IV

Q.

Is Annelida diploblastic or triploblastic?

Q. Which among the following is a common feature shared between Betta and Carcharodon?

1. Chambers in heart
2. Presence of air bladder
3. Cartilaginous endoskeleton
4. Mode of embryo development

Q. In cartilaginous fishes, gill slits are covered by an operculum.

1. True
2. False

Q. Heart of fishes has

1. four chambers
2. three chambers
3. two chambers
4. Only one chamber

Q. Tube feet is locomotory organ in

1. star fish
2. jelly fish
3. silver fish
4. both a) and b)

Q.

Class 9 English Poem The Snake Trying, 1. What is the snake trying to escape from? 2. Is it a harmful snake? What is its colour? 3. The poet finds the snake beautiful. Find the words he uses to convey its beauty. 4. What does the poet wish for the snake? 5. Where was the snake before anyone saw it and chased it away? Where does the snake disappear?

Q.

Which is correct regarding respiration in adult frog?

1. In water – skin, gills

2. On land – skin, lungs, gills

3. In water – skin, buccal cavity

4. On land – skin, buccal cavity

Q. Common characteristics found in chondrichthyes and osteichthyes
a. Streamlined body
b. Four pairs of gills
c. Two-chambered heart
d. Poikilothermous (cold-blooded)
c. Dioecious (sexes are separate)
f. Internal fertilisation

1. Five
2. Four
3. Six
4. Three

Q.

Which of the following fish is a surface feeder?

1. Eels

2. Bass

3. Haddock

4. Catla

Q.

What fish will eat diatoms?

Q. Which of the following belong to class osteichthyes?
A. Sea urchin B. Seahorse
C. Flying fish D. Sawfish
E. Dogfish

1. B & C
2. A, B & E
3. A, D & E
4. B & E

Q.

Why do catfish not have scales?

Q. Schizocoelomates and enterocoelomates are

1. acoelomates
2. invertebrates
3. true coelomates
4. echinoderms only

Q.

What type of scales do Osteichthyes have?

Q. The true coelom is a space between the body wall and the alimentary canal. It is lined by

1. mesoderm on one side and ectoderm on the other side
2. endoderm on one side and ectoderm on the other side
3. mesoderm on both the sides
4. ectoderm on both the sides

Q. Which of the following classes do bony fishes belong to?

1. Amphibia

2. Osteichthyes

3. Chondrichthyes

4. Myxine

Q. Which one is common feature of Amphioxus, frog, seahorse and crocodile?

1. Skeleton of cartilage and bone.
2. Pharyngeal gill slits at least in developmental stages.
3. Dorsal solid nerve cord.
4. Three chambered heart.

Q.

Body Cavity In Members Of Annelida Is ______

1. Enterocoel

2. Pseudocoel

3. Schizocoel

4. None Of These