CBSE Questions for Class 11 Medical Biology Morphology Of Flowering Plants Quiz 12 - MCQExams.com

• Stophiole is the outgrowth of hilum which prevents in-out movement of water. This kind of structure is usually seen in legume crops like peas, beans, etc.. Legumes belong to the family fabaceae. Hence answer is Fabaceae

• The boundary between the bark and wood is the vascular cambium. Vascular cambium gives rise to secondary xylem to the inside, and to secondary phloem to the outside.
  
• The bark is divided into two regions by the cork cambium: the living area inside the cork cambium is the inner bark, and the dead tissue outside is the outer bark. 
  
• Apical meristem is found at root and stem tips. 
• Hence, the correct answer is 'Vascular cambium'.

• The cymose inflorescence is the type of determinate inflorescence in which the tip of the main axis terminates in a flower and further growth continues by one or more lateral branches which also behave like the main axis. In some plants, the terminal flower is subtended by two lateral branches which further ends in flowers, e.g. are Jasmine, Harsingar, Pink etc. Here the flowers are arranged in a basipetal manner i.e, the older one at the top and younger at the base.
• The racemose inflorescence is the indeterminate type of inflorescence which shows indefinite growth and bears a number of flowers due to the presence of active growing point, e.g., are Radish, Lupin etc. Here the flowers are arranged in an acropetal manner i.e., older at the base while younger at the top.
• So, the correct answer is "A - Racemose, B - Cymose".

Correct option: D

Explanation:

The following floral diagram is of a flowering plant of the $$\textit{Solanceae}$$ family also known as nightshade or potato family. The floral formula represents the characteristics of the flower.

K₍₅₎ – five sepals united [K: calyx (sepals)]

C₍₅₎ – five petals united [C: corolla (petals)]

A₅ – one whorl of five stamens [A: androecium (stamens)]

G₍₂₎ – bicapellary syncarpous hypogenous flower with five carpels [G: gynoecium (carpels)]

·  Flower: Bisexual

·  Sepals: five sepals which are united

·  Androecium: one whorl of five stamen

·  Sepals and petals are united i.e., epipetalous stamens

·  Gynoecium: superior ovary flower is hypogenous and have two united carpels.

Hence, the correct answer is ‘D’.

• The epicotyl bearing shoot apex and leaf primordia are enclosed in a foliar structure called coleoptile. It protects the plumule during emergence from the soil.
• The radicle is protected in a sheath called coleorhiza. It protects the radicle during its passage into the soil.
• So, the correct answer is " radicle, plumule ".

• Adventitious roots are those parts that arise from the organ other than the roots. They usually arise from the stem, internodes, leaves. 
• They may be underground or aerial. Examples include rhizomes, corms, tubers.