1
Question
How many of the following are charactenstics of arthopods?
1. protostome development
2. bilateral symmetry
3. a pseudocoelom
4. three embryonic germ layers
5. a closed circulatory system
How many of the following are charactenstics of arthopods?
1. protostome development
2. bilateral symmetry
3. a pseudocoelom
4. three embryonic germ layers
5. a closed circulatory system
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Solution
The correct option is C Three
Arthropods have a true coelom - membrane-lined cavity between the gut and the body wall that involves the internal organs. Ceolom covers most of the respiratory and reproductive organs through which blood flows. These organisms have an open circulatory system, open-ended arteries through which blood flows. The opening of the arthropods is mainly by mouth (protostome development). It is bilaterally symmetric with three embryonic germ layers. They are triploblastic with 3 germ layers.So the correct answer is D.
Arthropods have a true coelom - membrane-lined cavity between the gut and the body wall that involves the internal organs. Ceolom covers most of the respiratory and reproductive organs through which blood flows. These organisms have an open circulatory system, open-ended arteries through which blood flows. The opening of the arthropods is mainly by mouth (protostome development). It is bilaterally symmetric with three embryonic germ layers. They are triploblastic with 3 germ layers.
So the correct answer is D.
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