Question Detail

ZOO 101 ZOO 101 Past Questions Objective Question

Question

Which of the following is a defining characteristic of placentals?
Options
A Development in a pouch
B Development in a uterus with a placenta
Correct Answer
C Egg-laying
D No mammary glands
Correct Answer

Option B is the correct answer.

Detailed Explanation

Eutherians (placentals) are characterized by development in a uterus with a well-developed placenta that facilitates nutrient and gas exchange throughout gestation.

Hint

Think about which group has extended internal development with a placenta.

Question Info