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.
Hartmann's zebra (Equus zebra hartmannae) is one of two subspecies of mountain zebra. As the species name suggests, this zebra lives on mountain slopes and plateaus as high as 6,500 feet above sea level.This subspecies is endemic to Namibia, Angola and South Africa, where fewer than 30,000 survive.he three zebra species are part of the Equidae family, which also includes asses and horses. Zebras are endemic to sub-Saharan Africa. The word zebra is Portuguese for wild horse.. It may also have its origin in the Latin word equiferus, another word for a type of wild horse.