Answer:
• neutrons
• protons
Explanation:
The nucleus is made up of two types of subatomic particles, that is the protons and neutrons.
Answer:
Homologous structures provide evidence for common ancestry
The mouth, pharynx, esophagus, stomach, both intestines, and the anus make up the GI tract. Accessory organs are the salivary glands, liver, pancreas, and gallbladder. I hope this helps.
Answer:Nitrogen occurs in all organisms, primarily in amino acids
Explanation:
Nitrogen occurs in all organisms, primarily in amino acids (and thus proteins), in the nucleic acids (DNA and RNA) and in the energy transfer molecule adenosine triphosphate. The human body contains about 3% nitrogen by mass, the fourth most abundant element in the body after oxygen, carbon, and hydrogen.-wikipedia
