Subphylum: Urochordata

IMPORTANT

Subphylum: Urochordata: Overview

This topic covers the concept of Urochordata.

Important Questions on Subphylum: Urochordata

HARD
IMPORTANT

Assertion: Acraniata is a group of organisms which do not have distinct cranium.

Reason: It includes small marine forms.                

HARD
IMPORTANT

Read the following and choose the correct combinations.

S.No. Group Character Example
I Tunicata Bioluminescence Pyrosoma
II Osteichthyes Pelvic fins with claspers Echeneis
III Mammalia Six cervical vertebrae Bradypus
IV Caecilians Amphicoelous vertebrae Ichthyophis

EASY
IMPORTANT

Identify the correct statements with reference to Urochordata.
A Circulatory system is closed type.
B. Atrial cavity is lined with ectoderm.
C. Notochord is confined to the tail only.
D. Burrowing mode of life.

EASY
IMPORTANT

Paired appendages are not found in

EASY
IMPORTANT

In which of the following animals notochord is not present?

MEDIUM
IMPORTANT

During retrogressive metamorphosis of the ascidian tadpole, which one of the following does not regress? 

EASY
IMPORTANT

Test (tunic) of Herdmania is a thick protective covering. The test is composed of tunicine which is a

HARD
IMPORTANT

At retrogressive metamorphosis the urochordate larva

HARD
IMPORTANT

Identify the wrong statement about the embryological evidence of evolution.

EASY
IMPORTANT

Cotyledons are also called-

EASY
IMPORTANT

In which among the following animals, retrogressive metamorphosis is found?

MEDIUM
IMPORTANT

Given below are four matchings of an animal and its kind of respiratory organ :

(A) Silver fish - trachea
(B) Scorpion - book lung
(C) Sea squirt - pharyngeal gills
(D) Dolphin - skin

The correct matchings are