Which of the following contains stem cells that can produce only their own type of cells? 1) 6-week-old embryo 2) adult3) 3-day-old embryo 4) blastocyst

Which organelle breaks down sugar molecules that supply energy to the cell ?

Phosgene is a chemical agent that is formed by decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. a. false b. true

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations