Question

Mammals of species X reproduce without forming a placenta. You could determine to which of the three groups of mammals species X belongs if you knew any of the following except

• A. How its reproductive and urinary systems connect to the outside of the body?
• B. What happens to its eggs after they are fertilised?
• C. How it controls its body temperature?
• D. How its young obtain milk from the mother?

Answer 1

The correct option is A How its reproductive and urinary systems connect to the outside of the body?

Mammals are mainly of three types- monotremes, marsupials, and placental. Monotreme mammals do not give birth to young ones. Instead, they lay eggs. Like other mammals, monotreme females also nurse their young. They are also homeotherms, meaning they can maintain their body temperature.

So, the correct answer is 'How its reproductive and urinary systems connect to the outside of the body?'