Question

Plants adapted to grow in shades have

• A. larger photosynthetic unit size than the sun plants
• B. lower rate of $C{O}_2$ fixation than the sun plants
• C. more extended root system
• D. leaves modified to spines

Answer 1

The correct option is A larger photosynthetic unit size than the sun plants

Plants which are adapted to grow in the shade are called shady plants. To absorb more sunlight the plants growing in low light conditions have larger photosynthetic unit size. It means that they have more number of chlorophyll molecules per reaction center to trap more light energy available to them.
Plants adapted to grow in shades have normal roots, have higher rate of $C{O}_2$ fixation than the sun plants (a plant that grows normally in a sunny habitat where it receives light of relatively high intensity) and their leaves are modified to spines.