Some drugs, such as taxol and Tamiflu that are currently used with great success to treat cancer and viral infections, were discovered as mutations in the development of new cultivars of wheat. are derived from genetically modified cultivars that combine together traits of several plants. are derived from wild plants. represent the intrinsic value of wild species.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.

i think its both a and b