Answer:
D.
Explanation: Ecology: relation of organisms with one another or their surroundings.
Answer:
Genes & DNA
Explanation:
Heritable traits are known to be passed from one generation to the next via DNA, a molecule that encodes genetic information.Organisms inherit genetic material from their parents in the form of homologous chromosomes, containing a unique combination of DNA sequences that code for genes.
C. Mammary gland. Hope this helps!
