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Match each structure with its descriptions. _____ radula a. internal skeleton _____ exoskeleton b. external skeleton _____ endoskeleton c. stinging cell of cnidarians _____ cnidocyte d. excretory organ of insects _____ compound eye e. mollusk feeding device _____ tube foot f. larva of annelid or mollusk _____ trochophore g. has many lenses _____ Malpighian tubule h. moves an echinoderm _____ gastrovascular cavity i. digests a planarian’s food
Biology: The Unity and Diversity o...
Biology: The Unity and Diversity o...
Match each structure with its descriptions.
| _____ | radula | a. internal skeleton |
| _____ | exoskeleton | b. external skeleton |
| _____ | endoskeleton | c. stinging cell of cnidarians |
| _____ | cnidocyte | d. excretory organ of insects |
| _____ | compound eye | e. mollusk feeding device |
| _____ | tube foot | f. larva of annelid or mollusk |
| _____ | trochophore | g. has many lenses |
| _____ | Malpighian tubule | h. moves an echinoderm |
| _____ | gastrovascular cavity | i. digests a planarian’s food |
To match: Each structure with their suitable description.
Explanation of Solution
Radula: e. mollusk feeding device
The mollusks are soft-bodies animals that lack proper mouth parts. The radula scrapes the food consumed and helps to digest them.
Exoskeleton:b. external skeleton
The exoskeleton is the outermost hard port of the body of some invertebrates. The exoskeleton is often attached to muscles and helps in locomotion with the limbs or feathers.
Endoskeleton: a. internal skeleton
The endoskeleton is exclusive to the echinoderm invertebrates. The skin or epidermis of the echinoderms is deposited with bits of calcium carbonate that hardens it and forms the endoskeleton.
Cnidocyte: c. stinging cell of cnidarians
The tentacles have cells known as cnidocytes. The cnidocytes help to attack the prey with the specialized organelles called nematocysts.
Compound eye: g. has many lenses
There are two types of eyes: simple eyes and compound eyes based on the number of lenses. The compound eyes have several lenses and are present in arthropods like crustaceans and insects. The individual units of compound eyes are known as ommatidia. Each ommatidium has cornea, lens and photoreceptor cells for the sense of vision.
Tube foot: h. moves an echinoderm
Tube feet are the locomotory organs present on the limbs of echinoderms like the sea star...
Chapter 24 Solutions
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