Extant birds and mammals share a number of highly similar characteristics, including but not limited to, enhanced hearing, vocal communication, endothermy, insulation, shivering, respiratory turbinates, high basal metabolism, grinding, sustained activity, four-chambered heart, high blood pressure, and intensive parental care. These bird-mammal shared characteristics (BMSC) are considered to have evolved convergently in the two groups, while the selection pressures that underlie their convergent evolution are still under debate.
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Answer:
Extant birds and mammals share a number of highly similar characteristics, including but not limited to, enhanced hearing, vocal communication, endothermy, insulation, shivering, respiratory turbinates, high basal metabolism, grinding, sustained activity, four-chambered heart, high blood pressure, and intensive parental care. These bird-mammal shared characteristics (BMSC) are considered to have evolved convergently in the two groups, while the selection pressures that underlie their convergent evolution are still under debate.
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BIRDS & MAMMALS IN COMMON: