Asequence of human cell divisions accompanied by some growth and cell differentiation convert an early into a hollow ball of cells called a

*will mark brainliest for first correct answer* which of the following is most likely to affect the biodiversity of a park ecosystem? a. less rain than usual for several months b. ongoing pollution from a nearby factory c. park rangers plant a new type of tree d. disease wipes out an entire population

Which of the four major uses is predicted to change the least by 2020?

Nucleic acids offer variability because they contain alternate forms of genes called .