Coral reefs form in warm, shallow waters.
Answer:
Genes, chromosomes, and nucleus
Mammalia (mammals) have hair or fur and produce milk
Answer:
Touching, Smelling.
Explanation:
Touching will be useful to detect stimuli like coldness and hotness.
Smelling on the other hand will help to make observations on smell and change in smell. These two are among the five senses that we use to make observations as we record what we see, hear, touch and feel, smell and taste.