13. What is macroevolution? genetic changes among and within populations
minor changes in populations over a long time
changes in a population's allele frequencies
major changes in populations over a long time

  Evolution is a process that results in changes in the genetic material of a population over time. ... Microevolution reflects changes in DNA sequences and allele frequencies within a species over time. These changes may be due to mutations, which can introduce new alleles into a population.

a warm, wet climate will produce the highest rate of weathering. the warmer a climate is, the more types of vegetation it will have and the greater the rate of biological weathering (figure below). this happens because plants and bacteria grow and multiply faster in warmer temperatures.

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.