Hepatitis d virus is described as a defective virus because it cannot reproduce in a cell unless the cell is also infected with hepatitis

cell regulation is conducted by special proteins.

i thinking chemical change

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.

answer >   yes we do, women; have three holes, urethral opening(pee hole, vagina, and the women pee/girls pee out of the urethra like the men do; only they have a single opening to pee/ejaculate.   (sorry if i'm too forward with this, but this is for a biology class, isn't it? )

hope that !         : )