Assertion : The duck-billed Platypus and the spiny ant-eater, both are egg-laying animals yet they are grouped under mammals.
Reason : Both of them have seven cervical vertebrae and 12 pairs of cranial nerves.
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
If both Assertion and Reason are true but the Reason is not the correct explanation of the assertion
If Assertion is true but Reason is false
If both Assertion and Reason are false
A.
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
Mammal characteristics include the presence of hair and milk or mammary gland and presence of 7 cervical vertebrae and 12 pairs of cranial nerves.
The duck-billed platypus and the spiny anteater are mammals that lay eggs rather than give live birth to young ones. The platypus has a bill like a duck. fur like a mammal and webbed feet. It lays eggs that look like reptile eggs. Its young feed from the mother's mammary glands.The spiny anteater's covering looks like that of the porcupine. It has a long tongue to catch insects and a bill. It lays several eggs which it keeps in a pouch on its side.
Tube-within-a-tube body plan is shown by
coelenterates
platyhelminthes
aschelminthes (nemathelminthes)
porifers
Which of the following is not found in vertebrates
Bilateral symmetry
Gill opening
Body scales
Cnidoblasts
Which one feature is common to leech, cockroach and scorpion
Nephridia
Cephalisation
Ventral nerve cord
Antenna
True coelom appeared first in the course of evolution in
Aschelminthes
Chordata
Echinodermata
Annelida
