1.Scientists prove the same origin or common ancestor for Hans and Tibetans through comparative analysis on genetic Y chromosome.科学家通过遗传Y染色体的对比分析,证实汉藏两民族同根同源,拥有共同祖先。 英文短句/例句 1.presumably in the common ancestral line to dinosaurs and crocodiles and birds.可能是...
there is strong morphological support for this hypothesis. Birds and dinosaurs share such morphological features as an in-turned femoral head, opposable thumb, and a perforate acetabulum. An additional suite of characters indicate that birds are nested within theropod dinosaurs. Aves (as defined above...
Class structures that are wide and shallow usually represent forests of (2) classes that can be mixed and matched. Class structures that are narrow and deep represent trees of classes that are related by a common ancestor. There are advantages and disadvantages to each approach. Forests of ...
Now, a new study suggests that both dinosaurs and animals have more in common than previously thought – their ability to hear. The study, published in theJournal of Neuroscience, notes that alligators create the same type of neural maps of sound the way birds do, due in part to their com...
A major factor in dog welfare is a good relationship with their humans. In turn, living with a dog supports the wellbeing and even the mental and physical health of their human masters. In fact, the Palaeolithic partnership between humans and wolves was social and cooperative from its beginnin...