That process is known as DIGESTION........
<span>Arrange the following five events in an order that explains the mass flow of materials in the phloem.
1. Water diffuses into the sieve tubes.
2. Leaf cells produce sugar by photosynthesis.
3. Solutes are actively transported into sieve tubes.
4. Sugar is transported from cell to cell in the leaf.
5. Sugar moves down the stem.
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C) 2, 4, 3, 1, 5
Answer:
tentative
Explanation:
science is not an absolute fact nor fiction, but rather not certain nor fixed based upon what is observed, making it tentative.
Answer:
Order from higher to lower partial pressure is equal to
a. PO2 of pulmonary veins
b. PO2 of alveolar air
c. PO2 of pulmonary artery
Explanation:
In pulmonary artery the blood is impure i.e deoxygenated due to which the partial pressure of oxygen is lower in pulmonary artery as compared to the pulmonary alveoli which has pure or oxygenated blood.
The PO2 of Alveoli is equal to 104 mmHg while the PO2 of pulmonary artery is 40 mmHg.
For alveolar air, the partial pressure is equal to 100 mmHg
Thus, order from higher to lower partial pressure is equal to
a. PO2 of pulmonary veins
b. PO2 of alveolar air
c. PO2 of pulmonary artery