Class Osteichthyes

Q.

What is the structure and function of the heart of a fish?

Q.

Classify and explain different kinds of fishes with suitable examples and neat sketch.

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.

What are the 2 types of bony fish?

Q. Heart of fishes has

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

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

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

Q.

How the skin is covered in class Chondrichthyes?

Q.

How many fish types are there?

Q.

Give the zoological name of saw fish.

Q. Molluscs have only two germ layers- the ectoderm and the endoderm.

1. False
2. True

Q. Identify the organism shown in the image below.

1. Electric ray
2. Flying fish
3. Sea horse
4. Sawfish

Q.

Where are chondrichthyes found?

Q. Osteichthyes fishes are

1. marine forms
2. freshwater forms
3. both marine and freshwater forms
4. None of these

Q. Which of the following are the distinguishing feature between betta & Carcharodon
a) Chambers in heart
b) Embryo development
c) No of gills
d) Endoskeleton

1. All of these
2. b, c, d
3. a, b, c
4. only c&d

Q.

Lateral line system is present in

1. Fish

2. Invertebrates

3. Reptiles

4. Man

Q.

________ is the group of fishes in which fins are supported with bony or horny spines which are directly attached to the body.

1. Osteichthyes

2. Chondrichthyes

3. Sarcopterygii

4. Actinopterygii

Q.

Chondrichthyes can be differentiated from osteichthyes externally by

1. Naked gills

2. Heterocercal tail

3. Number of chambers in heart

4. Ventral mouth