Which of the following set of organisms have typhlosole in their digestive tract.

Bony fish and birds

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Earthworm and cyclostomes

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Reptiles and amphibians

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None of the above

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Solution

The correct option is B Earthworm and cyclostomes
An inner fold of intestinal wall of the earthworm and cyclostomes is the typhlosole. This is a teardrop-shaped structure that runs along most of the length of the intestine. It is essential for increasing the surface area available to absorb nutrients.

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Which of the following is/are the examples of bony fish?

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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