Question

Pretest: Unit 4

Question 2 of 30
Which of the following traits are characteristic of all mammals?
OA. They lay eggs that develop outside the mother's body.
OB. They breathe through gills.
OC. The mother feeds her young with her own milk.
OD. They walk on two limbs.
SURMT

Answer 1

Mammals are characterized by traits including the mother feeding her young with milk, walking on two limbs, and giving birth to live young.

Step-by-step explanation:

The characteristic traits of all mammals include:

1. The mother feeds her young with her own milk. Mammals are the only group of animals that produce milk to nourish their young offspring.
2. They walk on two limbs. Mammals have limbs adapted for various forms of locomotion, such as walking on two legs or four legs.
3. They do not lay eggs that develop outside the mother's body. Instead, mammals give birth to live young.

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