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Question
Fill in the blank.
Fishes obtain oxygen from water through ......................
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Solution
Fishes obtain oxygen from water through gills.
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RELATED QUESTIONS
Fill in the blank.
...................... live in the digestive tract of many vertebrates including human beings.
Match the following.
| Group | Characteristics | ||
| 1. | Molluscs | a. | Feed milk to young ones, warm-blooded |
| 2. | Spongers | b. | bag-like body with tentacles around the opening |
| 3. | Flatworms | c. | fins, gills and cold-blooded |
| 4. | mammals | d. | body with large opening and many small pores all over |
| 5. | Fish | e. | jointed legs, exoskeleton |
| 6. | cnidarians | f. | have only one opening |
| 7. | arthropods | g. | hard shell, soft body |
| h. | cylindrical, unsegmented body with mouth at one end and anus at the posterior end |
State if the following statement is true or false. Correct the statement if it is false.
Arthropods have a soft, outer covering called endoskeleton.
Find the odd one out. Give reason.
snail, oyster, earthworm, octopus
Answer in detail.
Name the different classes of arthropods. Write one characteristic feature of each class.
Classify the given animals into different categories indicated.
Jellyfish, liver fluke, pinworm, Ascaris, tapeworm, Hydra, sea anemone into cnidarians, Platyhelminthes, and Nemathelminthes.
Name the phyla to which following animal belongs: Hydra
Mention two special features of mammals.
Why are eggs of reptiles covered with shells unlike the eggs of amphibians?
What are pneumatic bones?
