EARTH SCIENCE
TECTONICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
All of the first mammal species were able to either swim or fly.
|
|
|
More mammals were migratory a long time ago than in present day.
|
|
|
The continents used to be connected and have moved farther apart over time.
|
|
|
Ocean levels used to be lower and allowed for easier travel between continents.
|
Detailed explanation-1: -The cynodonts, a theriodont group that also arose in the late Permian, include the ancestors of all mammals.
Detailed explanation-2: -Mammals were derived in the Triassic Period (about 252 million to 201 million years ago) from members of the reptilian order Therapsida. The therapsids, members of the subclass Synapsida (sometimes called the mammal-like reptiles), generally were unimpressive in relation to other reptiles of their time.
Detailed explanation-3: -Divergent evolution refers to the process by which interbreeding species diverged into two or more evolutionary groups. It means that these groups of species used to be similar and related. However, they became more and more dissimilar through time.
Detailed explanation-4: -Homologous features Physical features shared due to evolutionary history (a common ancestor) are said to be homologous.