What is the source for geothermal energy?
a. the sun
b. earth’s internal heat
c. moving water
d. biomass

Which symbols below represent the ions found in the glass of water ? a. oh- and h+ b. co2 and o2 c. o2 and h2 d. nh3- and h+

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

In order to study genetic mutations, scientists must study genetic material. which statement describes the genetic material scientists are most likely studying? a) they study alleles that contain chromosomes, which are rna.b) they study alleles that contain genes, which are chromosomes.c) they study chromosomes that contain genes, which are dna segments.