Question

which are the animal with no testes

Answer 1

The basal condition for mammals is to have internal testes. The testes of thenon-boreotherian mammals, such as the monotremes, armadillos, sloths, and elephants, remain within the abdomen. There are also some marsupials with external testes and Boreoeutherian mammals with internaltestes, such as the rhinoceros.

CONCLUSION:
from above u can that there r no such animals which don't have testicles or testes as u said ,they will have it whether internally or externally....bcz testes are used to store sperms which are the sole reason for continuation of life (ones own generation).......

hope this proves to be useful.......

Answer 2

The testes of the non-boreotherian mammals,such as the monotremes,armadillos,sloths and elephants remain within the abdomen.
There are also some marsupials with external testes,such as rhinoceros.Cetaceans such as whales and dolphins also have internal testes.
hope it will help you....IF IT HELPS THEN PLZ PLZ PLZ PLZ MARK IT AS THE BRAINLIEST..PLEASE