Answer:
Only Water, Oxygen, Nitrogen and ammonia
Explanation:
The main signal in small intestine for pancreatic bicarbonate ion secretion is Secretin.
When food from the stomach with acidic medium enters duodenum(first part of small intestine) it stimulates the lining of duodenum cells to release the hormone secretin.
This hormone travels via bloodstream to pancreas and stimulate to it to release bicarbonate ions.Now these ions enter duodenum and neutralise the acidic medium.
This results in the optimum pH for the enzymatic action to take place thereby promoting final digestion of protein.
C.
phytoplankton and zooplankton
Eukaryotes (IPA: [juːˈkæɹɪɒt]) are organisms whose cells are
organized into complex structures by internal membranes and a
cytoskeleton. The most characteristic membrane bound structure is the
nucleus. This feature gives them their name, (also spelled "eucaryote,")
which comes from the Greek ευ, meaning good/true, and κάρυον, meaning
nut, referring to the nucleus. Animals, plants, fungi, and protists are eukaryotes.
D. Denouement.
Denouement is the final part of a play, movie, or narrative, or a story in general.