How is genetic drift different from natural selection?

natural selection occurs because some alleles confer higher fitness, whereas genetic drift occurs because of sampling error.
natural selection has a stronger effect in large populations, whereas genetic drift acts primarily in small populations
natural selection is a mechanism of evolution, whereas genetic drift is not a mechanism but an outcome of evolution
natural selection tends to cause very rapid evolution, whereas genetic drift tends to operate on much longer time scales.

the answer is c.) there is a warm front in region a and a stationary front in region b.

b. climate change will cause an increase in biodiversity of all ecosystems.

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1)

i))the process of preparing food by green plants in the presence of sunlight is called photosynthesis.

ii) leaf is the site for photosynthesis.

iii) it takes place as,

6h2o+6co2=c6h12o6+602

the principle of segregation describes how pairs of gene variants are separated into reproductive cells. from his data, mendel formulated the principle of segregation. we now know that the segregation of genes occurs during meiosis in eukaryotes, which is a process that produces reproductive cells called gametes.