A subtance with a pH below 7 and
<span>a substance that tastes sour</span>
Answer:
Cell membrane and vacuole
Explanation:
Endocytosis is a process that occur in living cells in which substances are engulf in to the cells through the membrane to form vacuole. This occur when the cell membrane engulf materials into the cell and form vessicles called endosome and it move round the cell where it is digested.
Answer:
two versions of a gene are carried in a single normal cell called alleles