Class Pisces

Q. Whales and dolphins like fishes live in water. But they do not have gills. How do they breathe?

1. They do not require oxygen.
2. They breathe through moist skin.
3. They breathe through blowholes.
4. They breathe through spiracles.

Q.

A two-chambered heart is present in ___.

Q.

What is parazoa?

Q.

Statement 1: Pisces have a three-chambered heart.

Statement 2: Seahorse belongs to class pisces.

1. Both the statements are true

2. Both the statements are false

3. Statement 1 is true and statement 2 is false

4. Statement 1 is false and statement 2 is true

Q.

What if fish have no scales?

Q.

All of the animals below breathe using gills. True or false?

1. True

2. False

Q.

What are the characteristic features of pisces ? Give an example.

Q.

Pisces have special breathing organs called

1. Gills

2. Lungs

3. Skin

4. Spiracles

Q.

In which kingdom, will you place an organism which is multicellular, eukaryotic, heterotroph, lacks chlorophyll and has an ingestive mode of intake of food?

1. Kingdom Animalia.
2. Kingdom Fungi
3. Kingdom Protista
4. None of these

Q.

Name the two classes in phylum protozoa which do not possess locomotory organs.

Q. The gills help the fish to ____________.

1. take in oxygen from air
2. take in oxygen dissolved in water
3. absorb nutrients present in water
4. release waste substances in water

Q.

Assertion : Fishes respire through gills.
Reason : Counter current flow occurs in gills.

1. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

2. If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

3. If Assertion is correct but Reason is incorrect.

4. If Assertion is incorrect but Reason is correct.

Q.

Name the five classes of phylum Protozoa .

Q.

Muscular tail, streamlined body shape, scaly skin, and two-chambered heart are the characteristic features of class _______.

Q. Which among the following has a two chambered heart?

1. Frog
2. Pigeon
3. Crocodile
4. Fish

Q.

What scientific term is used for living in or on water?

1. Diurnal

2. Terrestrial

3. Nocturnal

4. Aquatic

Q.

Which of the following statements is incorrect?

1. The principle of countercurrent flow facilitates efficient respiration in gills of fishes.

2. Whales and dolphins do not have lungs.

3. Amoeba gets oxygen through simple diffusion across their cell membrane from the surrounding water.

4. The residual air in lungs slightly decreases the efficiency of respiration in mammals.

Q. The gills help the fish to ____________.

1. take in oxygen from air
2. take in oxygen dissolved in water
3. release waste substances in water
4. absorb nutrients present in water

Q. Head of cockroach according to its position is known as

1. Hypopharynx
2. Hepatocerebral
3. Hypognathous
4. Supragnathus

Q.

How can you say seawater is a habitat for living organisms?

Q. From the given organisms, pick the ones which possess a three chambered heart.

1. Rana tigrina
2. Labeo rohita
3. Both A and B
4. Neither A nor B

Q. Some fishes have an open circulatory system.

1. False
2. True

Q. Apart from breathing, gills can also help in capturing microscopic nutrients for the fishes.

1. True
2. False

Q.

Name breathing organ in fishes.

Q. Given above is the representation of the extent of global diversity of invertebrates. What groups the four portions (A-D) represent respectively?

1. A - Insects, B - Crustaceans, C - Other animal groups, D - Molluscs
2. A - Crustaceans, B - Insects, C - Molluscs, D - Other animal groups
3. A - Insects, B - Molluscs, C- Crustaceans, D - Other animal groups
4. A - Molluscs, B - Other animal groups, C - Crustaceans, D - Insects

Q.

___________ are cold-blooded and their hearts have only two chambers.

1. Birds
2. Snakes

3. Fishes

4. Mammals

Q. Observe the given set of characteristics and identify the class of vertebrata they belong to:
1) Streamlined body
2) Cold-blooded
3) Two-chambered heart

1. Amphibia
2. Reptilia
3. Aves
4. Pisces

Q. It lives underwater for up to three years as nymph before emerging as flying insect. Fossils of this insect dating back about 300 million years have been found. This insect is

1. Scorpion fly
2. Stone fly
3. Caddis fly
4. May fly

Q. Statement 1: All reptiles have a three chambered heart

Statement2: Reptiles lay eggs.

1. Only statement 1 is correct
2. Only statement 2 is correct
3. Both the statements are correct
4. Both the statements are incorrect

Q. The largest living insects are the

1. Giant water bugs
2. Giant silk moths
3. Giant crabs
4. All of the above