Which of the following includes three parts of the lymphatic system?
A) spleen, lungs, heart
B) heart, lymph fluid, spleen
C) tonsils, lymph nodes, arteries
D) lymphatic ducts, thymus, tonsils

dna is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).

tissue

explanation:

it is actually formed by geoup of cells which is tissue

you can't see the options

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.