Definition: these are physical features shared by organisms with common ancestry; they may have the same structure, but different functions developmentally mature organisms.

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

In 2015, about ten percent of total u.s. energy consumption was from renewable energy sources. renewable energy plays an important role in reducing greenhouse gas emissions. when renewable energy sources are used, the demand for fossil fuels is reduced. sanjay and his family want to cut back on their use of non-renewable resources at home. they are thinking of an alternate way to heat their home without adding more greenhouse gases or pollutants to the environment. which renewable resource would not fit into their plan? a) solar power b) burning wood c) constructing a wind turbine eliminate d) generating hydroelectric power

In meiosis ii during anaphase ii which structures separated homologous chromosomes or sister chromatids