Phylum Chordata - Sub phyla - Urochordata

Question 1

Urochordates occur in which water bodies

Answer 1

Marine

Question 2

Urochordates can be

Answer 2

sessile or pelagic and solitary or colonial

Question 3

example of sessile urochordate

Answer 3

Asidia

Question 4

example of pelagic urochordate

Answer 4

salpa and doliolum

Question 5

example of solitary urochordate

Answer 5

ascidia

Question 6

example of colonial urochordate

Answer 6

pyrosoma

Question 7

is the body segmented or unsegmented

Answer 7

unsegmented

Question 8

what is the tunic composed of

Answer 8

cellulose (uncommon in animals)

Question 9

is coelom present or absent

Answer 9

absent

Question 10

what is the pharynx surrounded by that serves as an opening to genital ducts,gill slit and anus

Answer 10

Ectoderm lined atrial cavity

Question 11

what is believed to be the forerunner of thyroid gland in vertebrates

Answer 11

Endostyle

Question 12

the endostyle is possessed by which side of the pharynx

Answer 12

ventral side of the pharynx

Question 13

is the digestive tract complete or incomplete

Answer 13

complete

Question 14

how many gill slits are present in the pharyngeal wall

Answer 14

2 to numerous

Question 15

circulatory system is of opened or closed type

Answer 15

Open type

Question 16

how is the heart

Answer 16

Simple tubular ventral heart which alternately reverses the direction of flow and blood

Question 17

how is the nervous system represented in adults

Answer 17

by single dorsal ganglion

Question 18

are they unisexual or bisexual

Answer 18

bisexual

Question 19

is the development direct or indirect

Answer 19

indirect (includes free swimming tadpole)