Concept:Not all food we eat have seeds.Sometimes we eat fruits and vegetables that do not have seed in them.Sometimes we eat roots, leaves and stem, they don't have seed in them.Explanation:Potato:Potato is thickened underground part of a stem.They do not have seeds.Tomato:Tomato is a berry fruit.It has many yellowish-whitish seeds in it.Pear:Pear is a fruit from a flowering plant.It has about 6-8 black to brownish seeds in the centre.Chikoo:The fruit is oval in shape and brown in colour and the skin feels rough.It has black seeds inside the pulp.Ladyfinger:Ladyfinger is a vegetable from a flowering plant.It has numerous whitish soft, slimy seeds.Bitter-gourd:Bitter gourd is a vegetable from a flowering vine.It has numerous hard brownish-whitish seeds.The seeds turn red after ripening.Onion:Onion is an underground stem with fleshy overlapping leaves.It has no seeds.Cucumber:?Cucumber is a fruit from a flowering vine.It has numerous whitish gelatinous seeds.?Thus, Bitter-gourd, Cucumber, Chikoo, Ladyfinger, Pear, and Tomato has seeds inside them.