Question

all mammals give birth to their young ones a) name two mammals who lay egg. b) between which two phyla do they serve as connection c) name a mammal who gave birth to poorly developed young ones

Answer 1

ans a) Two mammals who lay egg are Platypus and Porcupine.
ans b) reptilia and mammalia 
ans c) Kangaroo gives birth to poorly developed young one.

i hope it helps............

Answer 2

*echidna,platypus
*reptilia,mamalia
*kangaroo gives birth to poorly developed young ones

pls mark this only as brainliest if it helps