An X-chromosome

A Y-chromosome

Two X-chromosomes

Two Y-chromosomes

Both an X- and a Y-chromosome

breathe

produce urine

circulate blood

think

move

A cell that has the ability to form a complete organism through embryogenesis

A cell that has the ability to differentiate into any type of tissue if exposed to the appropriate chemical signals

A cell that has the ability to differentiate into a limited number of tissue types if exposed to the appropriate chemical signals

Stem cells from adult tissues

Stem cells from the inner cell mass

Most cells in the body contain a complete genome, despite the fact that most of the genes in the genome are not necessary for each cell's specific function

Cells lose genetic material over time, becoming less totipotent

All organisms are made of cells

All cells come from other cells

None of the other answers