Characteristics
Number of Cells
Type of Nutrition
Nuclear Membrane
Ribosomes
Organism A Organism B
single celled multicellular
autotrophic autotrophic
absent present
present present
Organism C
single celled
heterotrophic
absent
present
State one reason why organism A and organism C
might be placed into two different classification
groups, even though they are both single celled.

One reason that Organism A and Organism C will be placed in different groups will be due  to their MODE OF NUTRITION.

As described in the question, Organism A has an autotrophic mode of nutrition which means that it has the capability to produce its own food. Organism C is a heterotroph which means it cannot produce its own food and hence will have different properties as compared to the organism A.

1. law of superposition: when there are horizontal layers of rock. the layers at the top are the youngest.

2. law of uncomformity: where one layer is much younger than the previous one, therefore creating a gap in the time record.

3. inclusion: when there is a solid stone inside of another.

4. intrusion: a feature formed when a stone is filled with magma.

hope i answered your question.