Paramecia are single -celled organisms that reproduce sexually and asexually . How is a paramecium able to reproduce sexually ? (1 ) by breaking into different pieces that grow into adults ( 2) by splitting in half to form two identical paramecia (3 ) by exchanging genetic material with another paramecium ( 4) by acquiring new genes through mutation

Peat deposits are found in waterlogged places where dead plant material piles up. when peat is buried, it undergoes compaction. it is subjected to heat and pressure for a long time, and a lot of water is squeezed out during this process. nearly ten vertical feet of original peat material becomes one vertical foot of coal. which of these remains unchanged in the system during the conversion of peat to coal? a) area b) density c) mass d) volume