Free Biodiversity and Variety of Life MCQs with Answers

1831. Botanical name of tomato is:

• A. Solanum nigrum
• B. Solanum tuberosum
• C. Solanum melongena
• D. Solanum lycopersicum

Explanation: The botanical name of the tomato is Solanum lycopersicum.

1832. Vegetative reproduction of Agave occurs through

• A. Rhizome
• B. Stolon
• C. Bulbils
• D. Sucker

Explanation: (c): Vegetative reproduction in Agave occurs through bulbils. Bulbils are the specialized buds vegetative or floral that modifyinto a swollen structure. It seperates from the parent plant and on approach of favourable conditions gives rise to the new plant.

1833. Velamen is found in

• A. Roots of screwpine
• B. Aerial and terrestrial roots of orchids
• C. Leaves of Ficus elastica
• D. Aerial roots of orchids

Explanation: (d): Velamen is found in aerial roots of orchids. In many epiphytic orchids, the aerial roots are covered by a hygroscopic velamen tissue. They absorb water from the atmosphere.

1834. In groundnut the food/oil reserve is present in

• A. Epicarp
• B. Mesocarp
• C. Endosperm
• D. Cotyledons

Explanation: (d): In groundnut the food/oil reserve is present in cotyledons. It is very important commercial crop of Leguminosae.

1835. New banana plants develop from

• A. Rhizome
• B. Sucker
• C. Stolon
• D. Seed

Explanation: (b): Suckers are the sub­aerial modification of the stem. They grow obliquely upward from the main stem producing roots from the underground nodes. The sucker-like structures in bananas are also called sword suckers, which give rise to new leafy trunks.

1836. Mango juice is obtained from

• A. Epicarp
• B. Mesocarp
• C. Endocarp
• D. Pericarp and thalamus

Explanation: (b): Mango (Mangif era indica) of Family Anacardiaceae is a drupe. The edible part in mango is mesocarp.

1837. Which one yields fibers?

• A. Coconut
• B. Oak
• C. Teak
• D. Sisso

Explanation: (a): Coconut (Cocos nucifera) is commercial fibres yielding crop. Fibres originate from the upper epidermal surface of seed.

1838. Micropyle of seed is involved in the passage

• A. Male gamete
• B. Pollen tube
• C. Water
• D. Gases.

Explanation: (c) The micropyle of the seed is involved in the passage of water. Micropyle plays a very important role in absorbing water during the time of germination.

1839. A major characteristic of monocot root is the presence of

• A. Vasculature without cambium
• B. Cambium sandwiched between phloem and xylem along the radius
• C. Open vascular bundles
• D. Cattered vascular bundles

Explanation: (a) : In monocot root, a large number of vascular bundles are arranged in the form of a ring around the central pith. Vascular bundles are closed because there is no cambium present between the xylem and phloem.

1840. You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?

• A. Secondary xylem
• B. Secondary phloem
• C. Protoxylem
• D. Cortical cells

Explanation: (c): In stems, the protoxylem lies towards the center (pith) and the metaxylem lies towards the periphery. This type of primary xylem is called endarch. In the root, the protoxylem lies towards