CBSE Questions for Class 11 Medical Biology Morphology Of Flowering Plants Quiz 3 - MCQExams.com

• There are two forms of imbricate aestivation namely, descendingly imbricate and ascendingly imbricate. Vexillary aestivation is called descendingly imbricate. 
• In vexillary aestivation, there are five petals, of which the posterior one is the largest and it almost covers the two lateral petals. 
• The latter in their turn nearly overlap the two anterior or smallest petals.
• Flowers in the Fabaceae family have this type of arrangement of floral whorls.
  

• The Fabaceae or Leguminosae is commonly known as the legume or pea family. 
• Most of the economically important plants in the Fabaceae family are herbs. 
  
• It is an economically important family of flowering plants. 
• The Poaceae is a large family of monocotyledonous flowering plants. The Poaceae is the fifth-largest plant family.  
• It produces economically useful plants such as Barley, Maize, Oats, Rice, Bamboo, Meadow-grass, Ryegrass, etc. 

• When petals, sepals, and stamens are situated below the ovary, the flower is called hypogynous, and in this condition, the ovary will be superior. e.g., mustard, china rose, brinjal.
• Flowers of Liliaceae, Malvaceae, and Solanaceae are hypogynous.
  

Thus, the correct answer is option A.

• Liliaceae is a large family which has hundreds of exotic species in cultivation. These include hyacinths, tulips, onions, and true lilies. The largest family of flowering plants is the ubiquitous sunflower family.
• The sunflower family (Asteraceae) includes a great diversity of species, including annuals, perennials, stem succulents, vines, shrubs, and trees. It is well-represented in parks and gardens throughout the world, with bedding plants, ground covers, and shrubs. 

• A type of fruit that develops from an inflorescence, rather than from a single flower is known as composite fruit. Example - fig, pineapple, and mulberry.

• Twisted aestivation is found in the Malvaceae family. The characteristics of this family include, hypogynous, pentamerous flowers, presence of epicalyx, twisted aestivation of petals, basal part of the petals united with the basal part of the staminal tube, stamens are monadelphous and axile placentation. 
• Floral characteristics of the Fabaceae family include:-
  

Fruit: Legume

• Flowers in the pea family Fabaceae are irregular flowers, with 5 petals forming a distinctive banner, wings and keel appearance. 
• The banner (posterior petal) is a single petal with two lobes. It is also called a standard petal. Two more petals form the wings (lateral petals). The remaining two anterior petals are usually fused together and enclose the essential organs.

• Flowers in the pea family Fabaceae are irregular flowers with 5 petals, namely, standard wings, and keel. 
• The standard petal is a single petal with two lobes. Two more petals form the wings. The remaining two petals make up the keel and are usually fused together. 
• The flowers possess a single plane of symmetry and thus, called complete zygomorphic flowers. 
• A complete flower has all the whorls in the same flower. The male and female reproductive organs are in the same flower.

• Liliaceae consist of 15 genera and 705 species. These are herbaceous perennial plants.  
• They have three united carpels, superior ovary, and axile placentation. 
• Fruit is a capsule or berry. 
• It has underground storage organs such as bulbs, corms, and rhizomes. 
• The common example of Liliaceae family includes Allium sativum, Allium cepa, Astragalus membranaceus, Convallaria majalis, and Aloe vera.

Fabaceae is famous as Leguminosae or bean and pea family. This single monophyletic family possess three sub-families such as Mimosoideae, Papilionoideae, Caesalpinioideae.

While the family is known by the presence of five sepals, zygomorphic flower, gamosepalous. It has imbricate aestivation. The placentation is marginal with one elongated placenta on one side of the ovary (superior). Its ovules attached at the fusion of the carpel's margins and not axile (where the ovary is divided by radial spokes with placentas in separate locules).

Therefore, the correct answer is option E.

• Pulses are the edible seeds of plants in the legume family.
• All pulses belong to the family Fabaceae, also known as Leguminosae.
• It includes trees, annual or perennial herbaceous plants, and shrubs. 
  

• Amorphophallus (or simple spadix inflorescence) is the largest inflorescence with 5.5 m length. Amorphophallus inflorescences variety in size from small, to the largest unbranched inflorescence in the world. 
• This is the Amorphophallus titanium. It is found in the jungles of Sumatra. Whereas the remaining three are not in this category of inflorescence.

Thus, the correct option is C.

• Cloves represent the flower bud. They are aromatic. They are flower buds of a tree Syzygium aromaticum belonging to the family Myrtaceae.

• Cicer arietinum ( chick pea ) is an annual legume of the family fabaceae
• Its different types are also known as gram or Bengal gram.
• They are high in proteins.
• So the correct answer is 'Bengal gram'.

• Glycine max  (soy bean) is a species of legume , widely grown for its edible bean.
• A milk like preparation called soy milk is produced by soaking and grinding soya beans and then boiling the mixture and filtering out the particulates .
• It is a stable emulsion of oil, water and proteins.
• So the correct answer is 'Glycine max'

Crotalaria juncea, popularly known as Sunn hemp, brown hemp, Indian hemp or Madras hemp is a tropical Asian plant of the legume family (Fabaceae/Leguminosae).The plant is generally considered to have originated from Asia especially Asia tropical (Bangladesh; Bhutan; India).

So,  the correct answer is option B.