Question

select all the correct answers
which two of these statements are true about mammals?
□ the females have mammary glands
□ the females give birth to live young
□ they breathe using gills
□ their endoskeleton is made up of chitin

Explanation:

1. Mammary glands are a defining feature of female mammals, used to produce milk for offspring.
2. Most mammals give birth to live young; the exception are monotremes (egg-laying mammals), but this is still a broadly true characteristic of the group compared to the other false options.
3. Mammals breathe using lungs, not gills.
4. Mammals have an endoskeleton made of bone and cartilage, not chitin (chitin is found in arthropod exoskeletons).

Answer:

• The females have mammary glands.
• The females give birth to live young.