Which of the following contains stem cells that can produce only their own type of cells?
a. 6-week-old embryo
b. 3-day-old embryo
c. adult
d. blastocyst

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer

Which material is commonly used as a culture medium for living cells