Bacterial cells can pick up the DNA through the process of transformation. Lambda phages are used by eliminating the middle of its liner genome and adding the foreign DNA in the created space. The phage is then introduced into the bacterial cell where it replicated itself via the lysogenic cycle.
Answer is D. The periodic table rows are arranged by increasing atomic number. The atomic number is decided by how many protons they have.
You just divide 75 by 12
6.25 dozens
The bucket with lead added would replace more water, as it would require more volume to achieve the same mass.
