Principles used to select drugs for inclusion in combination chemotherapy regimens: 1  Drugs known to be active as single agents should be selected for combinations.  Drugs with different mechanisms of action should be combined in order to allow for additive or synergistic effects on the tumor.
Zebra duikers have gold or red-brown coats with 12-16 distinctive zebra-like stripes, dark markings on their upper legs, and russet faces. Newborns appear darker because they are born with their stripes closer together. An adult can grow to 90 cm (35 in) in length, 45 cm in height, and 20 kg (44 lb) in weight. Their horns are short and round with sharp pointed tips. They are about 4.5 - 5.0 cm long in males, and half that in females. Female body size is larger than males, possibly due to long gestation periods.
There are three species of zebras: the plains zebra, the Grevy'grÃ©vy s zebra and the mountain. zebrarevy'grÃ©vy s (Zebra equus) grevyi is the largest, type with a, long narrow, head making it appear rather-mule. Like it is an inhabitant of the-semi arid grasslands Of ethiopia and Northern. Kenya'grevy grÃ©vy s zebra is the, rarest species and is classified. as endangered