Animal Kingdom - Online Test
Q1. Book lungs are respiratory organ of
Answer : Option A
Explaination / Solution:
Book lung is a type of respiratory organ used for atmospheric gas exchange that is found in Arachnida such as scorpions and spiders.
Q2. Which of the following have notochord throughout life?
Answer : Option A
Explaination / Solution:
Amphioxus or lancelets are fish like marine chordates found in shallow temperate and tropical seas. They have notochord through out their life.
Q3. The aquatic organisms that can actively swim at will against the water current is
Answer : Option D
Explaination / Solution:
Necton is an aquatic organism that can actively swim at will against the water current. Benthos and planktons float with water current and not against the water current.
Q4. Haemocoel is found in
Answer : Option C
Explaination / Solution:
Haemocoel is the main body cavity of invertebrates such as insects. It is also found in pila which does not contain blood circulating system.
Q5. An egg laying animal grouped under mammals is
Answer : Option A
Explaination / Solution:
Most of the animals belonging to class mammalia are viviparous, produces young ones. But, Duck-billed platypus belongs to mammalian class but lay eggs.
Q6. When the coelomic fluid serves as a skeleton it is known as
Answer : Option B
Explaination / Solution:
Coelomic fluids serves as a skeleton in some insects called as hydrostatic skeleton that help in maintaining shape and size of the body of organisms in absence of bone or cartilage.
Q7. Which one of the following group of animals is correctly matched with its characteristics without any exception?
Answer : Option A
Explaination / Solution:
All cartilaginous fish or chondrichthyes possess cartilaginous endoskeleton. But some reptiles have four chambered heart. Chordates may be jawless and some mammals lay eggs also.
Q8. Animals which possess cleidoic egg exhibit
Answer : Option D
Explaination / Solution:
The cleidoic egg is the type of egg which reptiles and birds lays. These eggs exhibit internal fertilization and external development.
Q9. Which of these is a fresh water sponge?
Answer : Option C
Explaination / Solution:
Spongilla is a genus of freshwater sponges in the family Spongillidae found in lakes and slow streams. Sponges of the genus Spongilla attach themselves to rocks and logs and filter the water for various small aquatic organisms such as protozoans, bacteria, and other free-floating pond life. Unlike marine sponges, freshwater sponges are exposed to far more adverse and variable environmental conditions, so they have developed gemmules as a means of dormancy.
Q10. Which one of the following is a living fossil?
Answer : Option D
Explaination / Solution:
Limulus (the king crab or horse-shoe crab) continues to remain unchanged for past 190 million years. It is therefore, also called living fossil. Excretion occurs through four pairs of coxal glands. Respiration occurs through book gills.
