FREE NEET Biology Practice MCQ Test: Morphology Of Flowering Plants Exercise 2 Questions Answers With Detailed Explanations [PDF]

Answer: (b)

Answer: (a)

Answer: (b)

The statements describe the phyllotaxy condition of plants. Phyllotaxy is the arrangement of leaves on an axis or stem. Phyllotaxy facilitate the leaves to obtain maximum light for photosynthesis.

Answer: (a)

Figure A, B and C are respectively tap root, fibrous root and adventitious root. The root branches of the primary root are called as Taproot system. The monocotyledons will have the primary root as shortlived and has many numbers of small lateral roots. These roots develop at the stem base and they form a root system called a fibrous root system, which is observed in the wheat plant (monocot). In some plants like banyan tree, monstera, and grass, parts of the plant other than radicle will be responsible for the development of root system called as adventitious root system.

Answer: (d)

Answer: (d)

In the given figure, the root tip shows their different regions which are marked as A, B and C. The correct labelling of A, B and C are region of maturation, region of elongation and region of meristematic activity respectively.

Answer: (a)

Answer: (a)

Answer: (a)

Answer: (c)

Answer: (a)

Vexillary aestivation is found in papilionaceous family. In cymose type of inflorescence, the main axis terminates in a flower, hence is limited in growth. In parietal placentation ovary is one chambered but it becomes two cambered due to formation of the false septum.

Answer: (a)

Thorn is a stiff, sharp-pointed woody projection on the stem or other part of a plant. Thorns are found in many plants such as Citrus, Bougainvillea. They protect plants from grazing animals.

Answer: (c)

Cauliflower has the scientific name Brassica oleracea belonging to the variety botrytis.

Answer: (d)

Syngenesious condition is found in Asteraceae. It is the condition when stamens are united by their anthers (filaments free). Epipetalous condition is also seen here.

Answer: (c)

In litchi, aril forms the edible part in fruit. It is a collar like outgrowth from the base of the ovule forming a kind of third integument. Litchi is a nut. In litchi, the epicarp and mesocarp (layers of pericarp) together become leathery and the endocarp is membranous.

Answer: (d)

Placentation is the arrangement of ovules within the ovary. It is of different types namely, marginal (pea), parietal (mustard, Argemone), axile (China rose, tomato, lemon) and free central (Dianthus, Primrose).

Answer: (b)

Based on the position of floral parts on thalamus, flowers are divided into three types shown in the figures. Figures A, B and C are respectively hypogynous, perigynous and epigynous flower.

When the calyx, corolla and androecium arise below the ovary, the flower is called hypogynous. In these flowers the ovary is superior. e.g., cruciferae, liliaceae. In perigynous condition of flower, the calyx, corolla and androecium arise around the ovary. In these flowers the ovary is semi inferior. e.g., Saxifraga. When the calyx, corolla and androecium arise from the top of the ovary, the flower is called epigynous. In these flowers the ovary is inferior. e.g., umbiliferae, compositae.

Answer: (a)

Polyadelphous condition represents cohesion of stamens. In this condition stamens of a flower are fused by their filaments only to form many groups, e.g., Citrus.

Answer: (b)

Free central placentation occurs in Dianthus and Primula in which ovules are borne on central axis and septa are absent.

Answer: (b)