The animals belong to protochordata or acrania are further classified into…….. sub-phyla.
a) two
b) three
c) four
d) five
Explanation: 1. Urochordata,
2. Cephalochordata
In which of the following animals of phylum chordata, the notochord is present only in free swimming larvae and is absent in adults?
a) urochordates
b) cephalochordates
c) vertebrates
d) mammals
Explanation: they are also called tunicates as their body covered by a sheath called tunic which chemically made of tunicin (a substance related to cellulose)
Which of the following is/are the characteristics of urochordates?
a) both larvae and adults are sessile
b) both larvae and adults are motile
c) larvae sessile but adult are motile
d) larvae motile but adults are sessile
Which of the following is/are the example/s of urochordates?
a) Ciona intestinalis
b) Molgula
c) Branchiostoma
d) both a and b
In which of the following, the notochord is well developed in adults?
a) urochordates
b) cephalochordates
c) vertebrates
d) mammals
Explanation: also called sea lancelet
Which of the following is/are the example/s of cephalochordates?
a) Ciona intestinalis
b) Molgula
c) Branchiostoma
d) both a and b
Explanation: commonly called amphioxus
