In mammals, the action of modifying gene expression in which one X chromosome is inactivated in the cell of females differs from how miRNA performs gene silencing in that

miRNA blocks transcription factors.
miRNA is a method of posttranscriptional gene silencing.
miRNA modifies histones on DNA.
miRNA methylates acetyl groups to repress translation.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

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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.