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Chaetognath Embryogenesis and Deuterostome Affinities

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Chaetognath Embryogenesis and Deuterostome Affinities

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Questions and Answers

What characteristic gives rotifers their name?

Corona

Ciliated crown (correct)

Eyespot

Brain

Where are most freshwater rotifers found?

On the substrate (correct)

In the water film between sand grains

Swimming in open water

In deep underwater caves

Which organ secretes the adhesive material used by rotifers for attachment?

Cloacal bladder

Pedal glands (correct)

Salivary gland

Gastric gland

What do rotifers consume?

Bacteria, blue-green algae, and diatoms Signup and view all the answers

How is the body wall of many rotifer species structured?

Superficial rings Signup and view all the answers

What is the function of the corona in rotifers?

Locomotion Signup and view all the answers

Which of the following best describes the development of the coelom in chaetognaths?

It develops by enterocoely. Signup and view all the answers

What does the text suggest about the cleavage patterns in chaetognath embryos?

They are similar to those of crustaceans and nematodes. Signup and view all the answers

Which of the following statements about the nervous system of chaetognaths is true according to the text?

It is similar to that of other protostomes. Signup and view all the answers

What does a recent study using newly generated molecular data suggest about the placement of chaetognaths?

It supports placing chaetognaths within Gnathifera. Signup and view all the answers

What is the approximate length of the only known micrognathozoan species, Limnognathia maerski, according to the text?

142 μm Signup and view all the answers

Which of the following statements about micrognathozoans is true based on the information provided in the text?

They have a ventral ciliary adhesive pad that produces glue. Signup and view all the answers