Over time, a series of random occurrences can cause an allele to become more or less common in a population. This is called
A. Bottleneck effect
B. Founder effect
C. Genetic drift

your answer should be c) enjoy!

answer: c

explanation:

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.

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.

here's your answer.