Subphylum Urochordata

--------- is a characteristic feature of Ascidiacea

• Progressive metamorphosis

• Retrogressive metamorphosis

• Retrospect metamorphosis

• Protagon metamorphosis

Members of ___________ have a body covered with tunic

• Ascidiacea

• Thaliacea

• Larvacea

What is indirect development?

• Absence of larval stages

• Presence of larval stages

The ascidian larva is

• Positively geotropic & negatively phototropic

• positively phototropic & negative geotropic

• negatively phototropic

• None of the above

The ascidian larva is

• Highly motile

• Cannot feed

• Gut not well developed

• None of these

The name 'Appendicularians' is given urochordates of the class:

• Larvacea

• Ascidacea

• Thaliacea

• Leptocardii

The common name 'sea squirt' is for the organism

Which urochodates are attached to substrata?

• Thaliacea

• Larvacea

• Ascidacea

• None of these

Which all structures are present in adult Herdmania?

• Atrial & branchial siphons

• Body proper

• Foot

• Test

Which of the following is NOT a class within the Chordata phylum?

• sponges

• amphibians

• birds

• mammals