The following statements refer to cyclins: i. cyclins protein levels are constant throughout the cell cycle, but activity varies with the phase of the cell cycle. ii. cyclins have measurable enzymatic activity that oscillates with the cell cycle. iii. cyclins are ubiquitinated and degraded at specific phases of the cell cycle. iv. cyclins bind to cdks. v. cyclins are g proteins. which of these statements are true?

I believe that 1, 4 and 5 are the correct ones.

Explanation:

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.