Answer:
a) only living things are made of cells
Cells differ as the bases of the dna (adenine, guanine, thymine and cytosine) come in different orders therefore coding for different amino acids, proteins, etc. This results in differing phenotypes and genotypes
Bohr's model treats electron energy levels as clearly defined orbital paths around the nucleus like planets orbit the Sun. The cloud model treats the energy levels as probability clouds, regions in which electrons are likely to be found.
Answer: phagocytosis; lysosomes
Collar cells in the sponge digest food through phagocytosis or by using enzymes that come from the lysosomes. Bacteria are among the elements that are broken down by phagocytosis with the help of some specific enzymes found in lysosomes.