Question at position 19 The fact that parental care defines Amelia evolution is driven home by what shared characteristic of all mammals?spinesplacental birthmammary glandsembryonic pouchesClear my selection单项选择题
A
spines
B
placental birth
C
mammary glands
D
embryonic pouches

Question

Question at position 19 The fact that parental care defines Amelia evolution is driven home by what shared characteristic of all mammals?spinesplacental birthmammary glandsembryonic pouchesClear my selection单项选择题

A

spines

B

placental birth

C

mammary glands

D

embryonic pouches

BlackTom AI · Accepted Answer

The question asks to identify a characteristic shared by all mammals that underpins parental care. 
Option 1: spines. While some mammals have spines or spiny features, this is not universal to all mammals (it's not a defining trait across the group), so this option is incorrect. 
Option 2: placental birth. This is true for placental mammals, but not for all mammals (monotremes like platypus and echidna lay eggs), so it cannot be the universal characteristic. 
Option 3: mammary glands. All female mammals possess mammary glands, which produce milk to nourish offspring, a key feature that drives parental care across the group. This aligns with the concept of parental investment and is universal among mammals, making it the best-supported choice. 
Option 4: embryonic pouches. Pouch development is characteristic of marsupials in some species, but not all mammals, so this is not a universal mammalian trait. 
In summary, the correct inference centers on mammary glands as the shared, defining mammalian trait related to parental care, while the other options either describe non-universal traits or are not present in all mammals.

Question at position 19 The fact that parental care defines Amelia evolution is driven home by what shared characteristic of all mammals?spinesplacental birthmammary glandsembryonic pouchesClear my selection单项选择题

类似问题

During breastfeeding, ________ are the bulb-like glands that produce milk.

A cow's udder has how many mammary glands?

What was the world's first widely adopted biodiversity policy?

The aim of the Paris Agreement is to ensure that the earth’s preindustrial temperature is not exceeded by more than º Celsius.

The IPCC's mission is to Blank ______.

Why have most international agreements for environmental protection been based on the honor system?

As was exhibited with the Montreal Protocol and the encouragement of reduced CFC production, trade can be an effective tool to compel compliance with international treaties.

The Stockholm Declaration and UNEP were the result of the Blank ______ first conference on the Human Environment in 1972.

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单