The correct order of the following events on the mass flow of materials in the phloem is:
- Leaf cells produce sugar by photosynthesis.
- Solutes are actively transported into sieve tubes.
- Water diffuses into the sieve tubes.
- Sugar moves down the stem.
Correct answer: letter C.
This is because the mass flow of materials in the phloem must pass through all these processes in a consecutive and orderly manner, from the cell to the stem, in order to allow nutrients and other vital materials to reach from the plant roots to the leaves and fruits.
<h3>How is this transport of nutrients and other vital materials achieved?</h3>
This is accomplished by the transport of solutes through the phloem's network of channels, which contain fluids, mineral salts, vitamins and other nutrients essential to plant health. Mass flow also helps distribute oxygen and carbon dioxide to all parts of the plant. These materials are necessary for plant respiration and growth.
Learn more about the phloem:
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Answer:
A: The synthesis of triose phosphate from 3-phosphoglycerate
Explanation:
The process through which plant manufacture foods using inorganic raw materials in the form of water and 
is referred to as photosynthesis. This process/reaction can be divided into two main steps:
- The light dependent reaction
- The light independent reaction also known as the dark reaction or the Calvin cycle
The light reaction involves the cleavage of water molecules and evolution of oxygen gas. The light absorbing chlorophyll in the various plant organs converts the energy from the sun into chemical energy in the form of ATP and NADPH.
The dark reaction involves the fixation of and requires the energy generated in the light dependent reaction. combines with ribulose-1,5-bisphosphate (RuBP) in the presence of an enzyme known as rubsico to form a two 3 carbon compounds, 3-phosphoglycerate.
The 3-phosphoglycerate produced is then reduced using NAPH and ATP from light dependent reaction to produce triose phosphates.
<em>Hence, if the pesticide affects plants by decreasing ATP production in the chloroplast which happens to be the site of photosynthesis in plants, it will directly affect the synthesis of triose phosphates from 3-phosphoglycerate.</em>
Animals are multicellular, we are heterotrophic
Free-Air Carbon dioxide Enrichment (FACE) is a method used by ecologists and plant biologists that raises the concentration of CO. 2 in a specified area and allows the response of plant growth to be measured. Experiments using FACE are required because most studies looking at the effect of elevated CO.
