Biology, asked by Debanpaul555, 1 year ago

difference between prototheria and eutheria

Answers

Answered by divyanshi188
0
The answer is attached
Attachments:
Answered by Anonymous
3
✌️✌️hey mate,

____________________

➡️Prototheria:

1. They are OVIPAROUS.
2. Ear is devoid of pinna .
3. Scrotum is absent in male.
4. Vagina and uterus are absent.
5. Nipples are absent over the mammary gland.
e.g.,
•Echidna,
•Tachyglossus,
•Ornithorhnchus.

➡️Eutheria:
1. They are ViViPAROUS.
2. pinna is present except in aquatic forms.
3. the scrotum is present on the sides and behind the penis.
4. they are single structure.
5. nipples are present.

➡️Metatheria:
1. They are ViViPAROUS.
2. ear possess a pinna.
3. scrotum is present but infront of penis.
4. both vagina and uterus are double.
5. Nipples are present.

e.g.,
•Macropus,
•Didelphis.
____________________

thanks...
Similar questions