Which of the following statements is true? Energy can be created, but not destroyed

Some machines are 100 percent efficient

Atomic energy can’t be converted into electricity

When work is done, some energy is always “lost” as heat

i think its c. amphipod

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.