AP BIOLOGY

PLANTS

TRANSPORT IN PLANTS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the most abudant solute in phloem sap?
A
amino acids
B
hormones
C
sugar
D
minerals
Explanation: 

Detailed explanation-1: -The phloem sap contains high quantities of sugars, amino acids, vitamins, and organic and inorganic acids. Sugars and amino acids are the major components of the phloem sap. Sucrose is the predominant sugar in phloem sap.

Detailed explanation-2: -State that sucrose is the most prevalent solute in phloem sap.

Detailed explanation-3: -Axial parenchyma cells are more abundant in phloem than in xylem. Parenchyma cells perform multiple functions like storing carbohydrates (starch), water, or nitrogen, and facilitating the communication between xylem and phloem.

Detailed explanation-4: -Sucrose is the main sugar in phloem sap and its concentration varies between species. Other sugars such as hexoses (e.g., glucose and fructose), raffinose-oligosaccharides, and polyols (mannitol and sorbitol) are also found in phloem sap [1].

Detailed explanation-5: -The most abundant element in the universe is hydrogen, which makes up about three-quarters of all matter! Helium makes up most of the remaining 25%. Oxygen is the third-most abundant element in the universe. All of the other elements are relatively rare.

There is 1 question to complete.