Which statement describes the leaves of vascular plants?

Which statement describes the leaves of vascular plants?

• A. Carry water upward from roots
• B. The main photosynthetic organs of vascular plants; chloroplasts and stomata
• C. Absorb water and minerals from soil
• D. Store food in roots

Answer: (B)

Leaves in vascular plants are the primary sites where photosynthesis happens. They house chloroplasts, the green cells that capture light energy and convert carbon dioxide and water into sugars. The leaf surface also has stomata, tiny openings that regulate gas exchange by letting CO2 in for photosynthesis while balancing water loss through transpiration. The flat shape and network of veins maximize light capture and connect to the plant’s vascular system to move water from the roots and distribute the sugars produced. Absorbing water and minerals from soil is mainly done by roots, and storing food in roots isn’t a leaf function, so describing leaves as the main photosynthetic organs with chloroplasts and stomata best captures their role.

Leaves in vascular plants are the primary sites where photosynthesis happens. They house chloroplasts, the green cells that capture light energy and convert carbon dioxide and water into sugars. The leaf surface also has stomata, tiny openings that regulate gas exchange by letting CO2 in for photosynthesis while balancing water loss through transpiration. The flat shape and network of veins maximize light capture and connect to the plant’s vascular system to move water from the roots and distribute the sugars produced. Absorbing water and minerals from soil is mainly done by roots, and storing food in roots isn’t a leaf function, so describing leaves as the main photosynthetic organs with chloroplasts and stomata best captures their role.