Free Biodiversity and Variety of Life MCQs with Answers

• A. Apple
• B. Banana
• C. Tomato
• D. Potato

Explanation: (c) : A true fruit consists of a pericarp (fruit wall) formed from ovary wall and seeds formed from ovules.

• A. Vexillary
• B. Imbricate
• C. Twisted
• D. Valvate

Explanation: (b) : Aestivation is the arrangements of accessory floral organs (sepals or petals) in relation to one another in floral bud.

• A. Carrot
• B. Groundnut
• C. Radish
• D. Potato

Explanation: (d) : Carrot and Radish are root modifications while edible part of groundnut is seeds. Potato is an edible underground stem.

• A. Fifteen
• B. Eighteen
• C. Six
• D. Ten

Explanation: (a) : In the hypogynous flower the gynoecium occupies the highest position while the other parts are situated below it.

• A. Six
• B. Seven
• C. Eight
• D. Five

Explanation: (b) : The mode of arrangement of the sepals or petals with respect to one another in the floral bud is termed as aestivation.

• A. Brinjal
• B. Tulip
• C. Aloe
• D. Soybean

Explanation: (d) : Racemose inflorescence is also called indefinite and indeterminate type. Growth of the peduncle is indefinite.

• A. Has unlimited growth
• B. Bears a solitary flower
• C. Has unlimited growth but lateral branches end in flowers
• D. Terminates in a flower

Explanation: (d) : Cymose inflorescence is also called definite or determinate inflorescence. Growth of the peduncle is definite.

• A. Three
• B. Four
• C. Five
• D. Two

Explanation: (a) : In opposite phyllotaxy, two leaves are borne on the opposite sides of a single node.

• A. Parietal
• B. Free central
• C. Marginal
• D. Axile

Explanation: (d) : Placentation is the arrangement of ovules within the ovary. It is of different types namely, marginal (pea), parietal (mustard…

• A. Solanum
• B. Sesbania
• C. Trifolium
• D. Brassica

Explanation: (a) : Cymose inflorescence is also called definite or determinate inflorescence. Growth of the peduncle is definite.

• A. Asparagus
• B. Euphorbia
• C. Australian Acacia
• D. Opuntia

Explanation: (c) : In several species of Acacia found in the deserts of Australia the bipinnate lamina is absent.

• A. Aloe
• B. Tomato
• C. Papaver
• D. Michelia

Explanation: (d): Gynoecium is the female reproductive organ of a flower. It may be apocarpous (pistils separated) e.g., Michelia, or syncarpous…

• A. Mustard
• B. Gulmohar
• C. Tomato
• D. Datura

Explanation: (b): Flowers of Gulmour have bilateral symmetry. So, they are called zygomorphic. Datura, mustard, and tomato have actinomorphic flowers.

• A. Peach
• B. Cucumber
• C. Cotton
• D. Guava

Explanation: (a): If the gynoecium is situated in the center and other parts of the flower are located on the rim of the thalamus almost at the same…

• A. Penicillium - Conidia
• B. Water hyacinth - runner
• C. Bryophyllum - leaf buds
• D. Sunflower - bulbils

Explanation: The pair that is wrongly matched is "Sunflower - bulbils." The pairs "Penicillium - conidia," "Water hyacinth - runner," and "Bryophyllum…

• A. Option-A
• B. Option-B
• C. Option-C
• D. Option-D

Explanation: (b): The figure given in option (b) represents the free central placentation.

• A. Calotropis
• B. Neem
• C. China rose
• D. Alstonia

Explanation: (d): In Alstonia, five or more leaves arise from each node, so it shows a whorled phyllotaxy.

• A. Potato
• B. Colocasia
• C. Ginger
• D. Turnip

Explanation: Sweet potato is homologous to turnip as both are root vegetables i.e., both are root but modified for different functions.

• A. Marginal
• B. Basal
• C. Free central
• D. Axile

Explanation: (b): In the basal type of placentation the ovary is unilocular and ovules and generally reduced to one borne at the base of the ovary…

• A. Gulmohar
• B. Cassia
• C. Calotropis
• D. Bean

Explanation: (d): The flowers of Family Papilionaceae have butterfly-shaped corolla (papilionaceous corolla).