Which of the following characteristics is specific to ctenophora but absent in porifera?

No digestive system

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Acoelomate

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Gastrovascular cavity

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None of the above

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Solution

The correct option is C Gastrovascular cavity
Sponges are animals of the phylum Porifera. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them. Sponges do not have nervous, digestive or circulatory systems and depend on constant water flow for respiration, nutrition and excretion.

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Similar questions

Consider the following characteristics of a herbivore digestive systems and habits.

1. Cows have 4 chambered stomachs and chew cud.

2. Rabbits eat their droppings called cecotropes.

3. Pandas have short digestive system and a small number of bacteria in the gut.

4. Elephants have a large cecum (the part connecting the two intestines) containing fermenting bacteria.

Which of the above characteristics helps food to remain longer in the digestive tract?

Consider the following characteristics of herbivore digestive systems and habits.

1. Cows have 4 chambered stomachs and chew cud.

2. Rabbits eat their droppings called cecotropes.

3. Pandas have short digestive system and a small presence of bacteria in the gut.

4. Elephants have a large cecum (the part connecting the two intestines) containing fermenting bacteria.

Which of the above characteristics help food to remain longer in the digestive tract?

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