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.
Grevyâs zebras, which live in shrubland and grassland, live in Northern African countries-Kenya and Ethiopia. Interesting things about zebras. 1  Zebras eat a lot of grass. 2  They graze throughout the day. 3  The average height of a fully grown zebra is 1.25-1.5 meters (4-5 feet).4  Grevyâs zebras and Mountain zebras are both listed as endangered species.ebras live in africa and they are always in a large wild herd sometimes they are in the mountains they have a really good eyesight and good hearing so thats how they know when the predators are coming to kill them. March 12, 2010 at 6:27 pm. this is amazing info! April 13, 2010 at 4:25 pm.