91Ó°ÊÓ

Assertion: Generally,the dicotyledonous plants have tap roots while monocotyledonous plants having fibrous roots. Reason: The roots in some plants get modified for storage of food, mechanical support and respiration.

Assertion: The flower is modified shoot meant for sexual reproduction. Reason: Flowers are arranged in different types of inflorescence.

Assertion: The plumule enclosed in sheath are called coleoptile. Reason: The radicle enclosed in sheath are called coleorhiza.

Assertion: In plants such as bean,gram and pea seeds are called non- endospermous. Reason: The endosperm inis not present in mature seeds of above plants.

Assertion: In mango and coconut, the fruit is known as drupe. Reason: The fruit develope in above plant are monocarpellary superior ovary and are one seeded.

Assertion: Actinomorphic flowers show radial symmetry. Reason: Zygomorphic flowers have bilateral symmetry.

Assertion: Petals are usually bright coloured Reason: Petals attract insect for pollination.

Assertion: Thorns are found in plants such as citrus and bougainvillea. Reason: Thorns protect plant from grazing animals

Assertion: Parallel venation is the characteristics of most of monocots. Reason: In parallel venation veins run parallel to each other with in a leaf lamina.

Assertion: Leaves are modified into spines in Cacti. Reason: It protect plant from grazing animals and excessive transpiration