Question

What are the types of mammals? (choose all that apply) marsupials placentals monotremes primates

Answer 1

Final Answer:

The types of mammals among the options provided are marsupials, placentals, and monotremes.

Step-by-step explanation:

Marsupials: This group includes mammals such as kangaroos, koalas, and opossums. Marsupials give birth to relatively undeveloped live young, which then continue to develop in a pouch.

Placentals: Placental mammals, the most diverse group, give birth to more developed young. The developing fetus is nourished via a placenta, a temporary organ that provides nutrients and exchanges wastes between the mother and the developing offspring. Examples include humans, dogs, and elephants.

Monotremes: Monotremes are unique mammals that lay eggs instead of giving birth to live young. Examples include the platypus and echidnas.

The option "primates" is not among the types mentioned. Primates, including humans, are a separate order within mammals.

For more detailed information on mammalian classifications, you can explore resources on zoology or biology.

Answer 2

Mammals are classified into three main groups based on their reproductive methods: monotremes which lay eggs, marsupials which give birth to underdeveloped young that mature in a pouch, and placental mammals which develop fully in the uterus with a placenta. Primates, including humans, are considered placental mammals.

Step-by-step explanation:

Types of Mammals

The types of mammals can be divided into three main categories: monotremes, marsupials, and eutherians (or placental mammals). Monotremes, such as the platypus and echidna, are unique in that they lay eggs. Marsupials, which include kangaroos and koalas, give birth to underdeveloped embryos that continue their development in the mother's pouch. Placental mammals, representing the majority, such as humans and elephants, develop fully inside the uterus and are nourished via a placenta. Notably, primates, which encompass monkeys, apes, and humans, fall under the category of placental mammals due to their reproductive strategy.