20+ need asap !
which major processes were needed for the origin of life on earth?
a. abundance of oxygen and the ozone layer
b. active volcanoes and very cold temperatures
c. low levels of ultraviolet radiation and specific mixture of gases
d. organic molecules produced from spontaneous synthesis or from meteorites

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

Drag the tiles to the boxes to form correct pairs. match the causes with their effects cause: tectonic plates at transform boundaries experience friction. cause: tectonic plates at transform boundaries experience friction. cause: earth is covered by a crust that runs miles deep.

True or false most plants are c3 plants, because they use molecules of carbohydrate known as g3p in their photosynthesis process.