Answer:
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.
The answer to this question is c. Osmotic pressure
the correct answer is true
I'm thinking that someone higher up the family tree has to have had the recessive trait, which makes it possible for anyone after them to have it. That or the parents can still be carrying it, because recessive traits aren't always displayed even if they're carried.