Class 11th Biology – 5 Morphology of Flowering plants MCQs

Sweet potato and turnip both are roots and become modified for special functions, the most common being the formation of tuberous roots for food storage.

Pulses which are economically important belong to the family Fabaceae.

Long filamentous threads of maize are the styles of the ovaries. In fact these are the longest styles in plants.

Pisum sativum belongs to the family Fabaceae/Leguminosae.

Castor is an endospermic (Albuminous seed). In albuminous seeds, embryo not consumed all endosperm. So, it persists in the mature seed. In these seeds, food stored in endosperm.

Flower is complete when it has calyx, corolla, androecium and gynaecium.

"Canna’s" flower can’t be divided into similar halves. So, flowers of canna are asymmetric, whereas flowers of bean, gulmohur, and cassia can be divided into similar halves (only in one particular vertical plane) and hence their flowers are called zygomorphic flowers.

Seeds of oak do not have endosperm and hence they are called exalbuminous seeds.

The leaves appear green because of pigment chlorophyll which does not absorb green light rather reflects it back.

monoecious plants have flowers of both sexes, i.e., staminate and pistillate flowers, e.g., ricinus,zea mays (maize) and cucurbits.

In parallel venation (striate venation), veins and veinlets run parallel to each other. Parallel venation is the characteristic feature of monocots.

Sepals are the members of calyx which protect the flower in the bud stage.

In dicotyledonous plants, the primary roots and its branches constitute the tap root system.

The major part of the grain is occupied by a large endosperm which is rich in starch. The endosperm has one to three layered peripheral protein layer called aleurone layer which separates the embryo with endosperm.

Hypericum calcinum has superior ovary. All plum, rose, and peach have half inferior ovary.

In the floral formula, Ca stands for calyx.

Keel is the characteristic of the flowers of family papilionaceae. For example, bean, gram, pea, etc. The flowers of this family have butterfly shaped corolla. The outermost petals of these flowers is the largest and is called vexillum, the two largest petals are similar and have wings and the two anterior petals called keel are fused enclosing stamens and carpels

Imparipinnate leaf is one where rachis is terminated by an odd leaflet. Pinnate with a single terminal leaflet

Onagraceae, eg., Evening prime rose, has inferior ovary in the gynoecium. Fabaceae, Solanaceae, and Liliaceae have superior ovary in the gynoecium.

China rose, mustard, and sun flower plants have a single leaf that arises at each node in an alternate manner.

Drupe is a fleshly one seeded, indehiscent fruit e.g., Mangifera indica

In Australian acacia, the leaves are short lived. In this plant,instead of the leaves the petioles expand and become green and carry out photosynthesis.

The broadened base of flower which lies at the tip of pedical is called torus or thalamus or receptacle.

Buds of garlic have greatly reduced stems. A corm is an underground, vertical, compressed stem with reduced scale leaves. Garlic bulbs consist mostly of individual segments called cloves.

Prop or pillar or columnar roots : They are pillar like roots which give extra mechanical support to heavy stem branches.e.g., Banyan tree

Flower is complete when it has calyx, corolla, androecium and gynaecium.

Bean, pea and gram do not have endosperm in the mature seeds and hence their seeds are called non-endospermous. Pine has an endospermous seed.

Decombent, procumbent, and prostrate are too weak to stand erect.

In the region of maturation, the cells form very fine and delicate, thread-like structures called root hairs.