The mass extinction occurring today differs from those that occurred in the past because

a.) it is due mainly to the actions of one species
b.) species are no longer evolving
c.) it is occurring globally
d.) niches are not being filled

Here's one way to follow the scientific method. place the missing steps in the correct position in the process.

Identify characteristics of energy from the sun. check all that apply. almost all of the energy on earth comes from the sun. energy from the sun is known as mechanical energy. the energy in fossil fuels originally came from the sun. plants convert the energy of sunlight into chemical energy.

Physical characteristics of down syndrome