HORTICULTURE

HORTICULTURE SCIENCE

PLANT BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which is a requirement associated with leaves as photosynthetic organs?
A
All leaf cells must have direct cell-to-cell contact with the vascular tissues
B
Interior leaf temperatures must fluctuate between night and day
C
Leaves must receive an extended period of darkness every day
D
The mesophyll cells must be continually supplied with water vapor
Explanation: 

Detailed explanation-1: -To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. for photosynthesis. Carbon dioxide enters through tiny holes in a plant’s leaves, flowers, branches, stems, and roots. Plants also require water to make their food.

Detailed explanation-2: -Leaves are the main photosynthetic organs in plants and thus they are eminently important for growth and biomass accumulation.

Detailed explanation-3: -In plants and algae, which developed much later, photosynthesis occurs in a specialized intracellular organelle-the chloroplast. Chloroplasts perform photosynthesis during the daylight hours. The immediate products of photosynthesis, NADPH and ATP, are used by the photosynthetic cells to produce many organic molecules.

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