Please select a subject first
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...................... live in the digestive tract of many vertebrates including human beings.
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Most arthropods have a tough outer body covering called ..........................
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................. have three pairs of jointed legs.
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Some .....................have two pairs of legs per segment.
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A ................. has an external coiled shell.
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................. is an example of a crustacean.
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Select the most appropriate answer.
The finger-like structures present around the mouth of cnidarians are called
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Organs of excretion in annelids are
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Annelids have a
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Scorpions and spiders are
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The body temperature of warm-blooded animals
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Bones with large air cavities are present in
a. cnidarians.
b. fish.
c. annelids.
d. birds.
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Select the most appropriate answer.
Milk in the body of mammals is produced by
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The animals without a backbone whose body is soft and often covered by a hard shell are .................
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Invertebrates with jointed legs belong to ....................
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The backbone of vertebrates is made up of a number of small bones called .....................
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Fishes obtain oxygen from water through ......................
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Vertebrates which spend a part of their life on land but reproduce in water are called ..................
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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 |
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Differentiate between
flatworms and roundworms
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