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Multiple Choice
The amniotic egg was a key evolutionary innovation because it allowed embryonic development to occur in which type of environment?
A
On land, away from water
B
Inside the bodies of mammals
C
In environments with high salinity
D
Only in aquatic environments
Verified step by step guidance
1
Understand the concept of the amniotic egg: The amniotic egg is a key evolutionary adaptation that allowed vertebrates to reproduce on land. It contains specialized membranes (e.g., the amnion, chorion, and allantois) that protect and nourish the developing embryo, reducing the dependency on water for reproduction.
Analyze the options provided: The question asks about the environment where embryonic development occurs due to the amniotic egg. Carefully evaluate each option to determine which aligns with the function of the amniotic egg.
Option 1: 'On land, away from water' - This is consistent with the purpose of the amniotic egg, as it allows reproduction in terrestrial environments by preventing desiccation and providing a self-contained aquatic environment for the embryo.
Option 2: 'Inside the bodies of mammals' - While mammals do have internal development, this is not directly related to the amniotic egg. Mammals evolved further adaptations, such as the placenta, for internal development.
Option 3 and 4: 'In environments with high salinity' and 'Only in aquatic environments' - These options are incorrect because the amniotic egg specifically evolved to reduce dependency on aquatic environments, enabling reproduction on land.