In life cycles that alternate between haploid and diploid stages, acts to reduce the number of chromosomes per cell from two sets to one set. in life cycles that alternate between haploid and diploid stages, acts to double the number of chromosome per cell from one set to two sets. in life cycles that alternate between haploid and diploid stages, acts to keep the number of chromosomes per cell the same. in animals, a single diploid cell called a divides by mitosis to give rise to all the cells of the adult body.

meiosis_

fertilization

mitosis

zygote

Explanation:

In life cycles that alternate between haploid and diploid stages, meiosis_ acts to reduce the number of chromosomes per cell from two sets to one set. In life cycles that alternate between haploid and diploid stages, ___fertilization__ acts to double the number of chromosome per cell from one set to two sets. In life cycles that alternate between haploid and diploid stages, mitosis acts to keep the number of chromosomes per cell the same. In animals, a single diploid cell called a zygote divides by mitosis to give rise to all the cells of the adult body.

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

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