. Beginners' Zoology . Fig. 372.— Hind foot a, fore foot b,tail c, of Beaver. Fig. 373.— Beaver. The molars are set close together and have their uppersurfaces level with each other. The ridges on them runcrosswise SO as to form a continuous filehke surface for MAMMALS 205 reducing the food still finer after it has been gnawed off(Fig. 345). The lower jaw fits into grooves in place ofsockets. This allows the jaw to work back and forth in-stead of sidewise. The rabbits and some squirrels have ahare lip; the upper lip is split. What advantage isthis in In England the species that b
. Beginners' Zoology . Fig. 372.— Hind foot a, fore foot b,tail c, of Beaver. Fig. 373.— Beaver. The molars are set close together and have their uppersurfaces level with each other. The ridges on them runcrosswise SO as to form a continuous filehke surface for MAMMALS 205 reducing the food still finer after it has been gnawed off(Fig. 345). The lower jaw fits into grooves in place ofsockets. This allows the jaw to work back and forth in-stead of sidewise. The rabbits and some squirrels have ahare lip; the upper lip is split. What advantage isthis in In England the species that burrow arecalled rabbits ; those that do not are called hares. Name six enemies of rabbits. Why does a rabbit usuallysit motionless unless approached very close .-* Do youusually see one before it dashes off. A rabbit has fromthree to five litters of from three to six young each have fewer and smallerlitters. Why must the rabbitmultiply more rapidly than thesquirrel in order to survive}English rabbits
Size: 1959px × 1276px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidbeginnerszoo, bookyear1922
