AP BIOLOGY

Detailed explanation-1: -Assertion :Sclereids are found in fruit walls of nuts, the pulp of fruits like guava, pear, and sapota, and seed coats of legumes. Reason: Sclereids are spherical, oval or cylindrical, highly thickened dead cells with narrow lumen.

Detailed explanation-2: -Note: Pear is a pomaceous fruit and belongs to the family of Rosaceae. The flesh of the fruit bears a grittiness which is due to the presence of sclereids in the flesh of the fruit. Sclereids are also known as stone cells and are sclerenchyma cells.

Detailed explanation-3: -Sometimes known as stone cells, sclereids are also responsible for the gritty texture of pears and guavas.

Detailed explanation-4: -So, the correct answer is ‘Sclereids.

Detailed explanation-5: -Sclerenchyma tissues are located in several areas. E.g. Sclereids are found in the shells of nuts, stones of fruits and fibres are abundantly found in the inner bark, wood, leaf veins, etc.