AP BIOLOGY

Detailed explanation-1: -As its area is broad, the lamina helps in the absorption of sunlight and carbon dioxide during photosynthesis. Photosynthesis takes place in the chloroplasts that have chlorophyll present in them. It is the chlorophyll that absorbs light energy from the sun.

Detailed explanation-2: -Roots possess hair-like projections called root hairs, which protrude from their surface. The root hairs aid the plant absorb more nutrients and water as they enhance the available surface area.

Detailed explanation-3: -Water moves into roots by osmosis, moves up the xylem to the leaves where some evaporates through the stomata-this creates a suction to pulls up more water behind it.

Detailed explanation-4: -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.