
What is true about earthworm, scorpion, cockroach, and silverfish?

Important Questions on Animal Kingdom



Which of the following statements are true for the phylum-Chordata?
(a) In Urochordata, notochord extends from head to tail, and it is present throughout their life.
(b) In Vertebrata, the notochord is present during the embryonic period only.
(c) Central nervous system is dorsal and hollow.
(d) Chordata is divided into 3 subphyla: Hemichordata, Tunicata, and Cephalochordata.


Consider following features:
- Organ system level of organisation
- Bilateral symmetry
- True coelomates with segmentation of body.
Select the correct option of animal group which possess all the above characteristics:


In the given diagram of the typical chordate. Identify the parts labelled as and select the correct option?





Statement Chordates have a tail extending posterior to the anus. It contains skeletal elements and muscles but lacks coelom and visceral organs.
Reason In aquatic organisms, it acts as a balancing organ.



Given below are two statements: one is labelled as Assertion and the other is labelled as Reason.
Assertion: All vertebrates are chordates, but all chordates are not vertebrates.
Reason: Notochord is replaced by a vertebral column in the adult vertebrates.
In the light of the above statements, choose the most appropriate answer from the options given below:





