Question

list which traits are possessed for the following

placenta,
vertebrae,
mammary glands,
two pairs of limbs,
for the

shark,
kangaroo,
chimpanzee,
bullfrog

Answer 1

Placenta: chimpanzee
Vertebrae: all organisms
Mammary glands: chimpanzee
Two pairs of limbs: chimpanzee, kangaroo
Shark - Vertebrae
Kangaroo - Placenta
Chimpanzee - Mammary glands
Bullfrog - Two pairs of limbs