Which one of the following statements are true? I.If the stem is joined with solid nodes and hollow internodes, it is called caudex. II.In Tridax, the stem is decumbent. III.Corm is a condensed from of rhizome growing more or less in vertical direction. IV.Sucker is an underground modification of stem. V.Biparous type of cymose branching is seen in Saraca.

In Bougainvillea thorns are the modifications of

Which of the following statements is incorrect regarding the properties of a parallelogram?

Identify a pair of the following plants, which show modification of axillary buds into tendrils and hooks respectively. I.Hugonia II.Duranta III.Passiflora IV.Dioscorea

A horizontal underground stem is a

Which of the following is NOT a function of lenticels?

In plants like mint and jasmine, a selender lateral branch arises from the base of the main axis and after growing aerially for sometimes, arch downwards to touch the ground. This slender branch is called

Parts of the plants were observed. Structure-A develops aerially and produces roots when comes in contact with the soil. Structure-B develops from underground part of the stem, grow obliquely, becomes aerial and produces roots on its lower surface. Identify, respectively the structure of A and B

Stems are

Which part of the stem is responsible for the primary growth of a plant?

In a dicot stem undergoing secondary growth, which tissue is primarily responsible for the increase in girth?