Concept explainers
To replace:
The italicized word with correct word.
Introduction:
The mammals are the organism that carry the babies in their wombs and give birth to the young ones. In initial days, the young ones are fed by the milk produced in the mammary glands of these organism.
Answer to Problem 15A
The mammals have evolved from therapsids.
Explanation of Solution
Therapsids are considered to be as the ancestors of the mammals, which give rise to the mammals of the modern world. The monotremes are the mammals, which do not give birth to the young ones, instead they lay eggs like other animals.
Chapter 30 Solutions
Biology Illinois Edition (Glencoe Science)
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