Railway Science (Biology – Plant Kingdom)

(d) Tiger Lily

Total Questions: 50

41. _____ is NOT a carnivorous plant. [RRB NTPC CBT - I (04/02/2021) Evening]

Correct Answer: (d) Tiger Lily
Solution:

It is a herbaceous perennial with green leaves. Herbivorous plants - Plants that only eat vegetation such as grasses, fruits, leaves, vegetables, and roots. Carnivorous plants - Plants that derive some or most of their nutrients from trapping and consuming animals or protozoans, typically insects and other arthropods. Examples : Venus flytrap, Drosera, Pitcher (insectivorous plant), Waterwheel plant.

42. In which of the following is the plant body NOT differentiated into root, stem and leaves? [RRB NTPC CBT - I (08/02/2021) Morning]

Correct Answer: (c) Spirogyra
Solution:

Spirogyra (water silk or pond silk) - Free-floating green algae present in freshwater habitats such as ponds, lakes. Ferns - Plants that do not have flowers, they generally reproduce by producing spores (spores can be found at the underside of leaves). Thuja - A genus of coniferous trees in the Cupressaceae. Marsilea - Belongs to Division Pteridophyta.

43. Which of the following is the edible part of a potato plant? [RRB NTPC CBT - I (10/02/2021) Morning]

Correct Answer: (c) Stem
Solution:

Potatoes are special stems, called tubers, that grow underground in plants (Binomial name - Solanum tuberosum). Examples of vegetables from stems - Onion, ginger, garlic, yam, celery, turmeric, kohlrabi etc. Example of vegetables from flowers - Cauliflower, broccoli, moringa and banana etc.

44. The characteristic colour of Marine Algae depends on the pigments located in the plastids. Which pigment leads to ‘Green’ colour of the algae? [RRB NTPC CBT - I (11/02/2021) Morning]

Correct Answer: (d) ChlorophyII
Solution:

Phycocyanin is any of a group of blue photosynthetic pigments present in cyanobacteria. Zeaxanthin is one of the most common carotenoids in nature, and is used in the xanthophyll cycle. Beta Carotene is a compound that gives vivid yellow, orange, and red coloring to vegetables. it converts into vitamin A (retinol).

45. Plants having no vascular system are known as: [RRB NTPC CBT - I (12/02/2021) Morning]

Correct Answer: (a) bryophytes
Solution:

Bryophytes:- also known as Non-vascular seedless plants. They reproduce sexually by spores and asexually by fragmentation or the production of gemmae.
Pteridophytes - They are vascular plants and have leaves (known as fronds), roots and sometimes true stems, and tree ferns have full trunks.
Tracheophytes - Plant contains vascular tissues such as xylem and phloem plays a role in distributing food and water to the plant cells.
Gametophyte - It is a stage in the life cycle that is found in all plants and certain species of algae.

46. To which family does the ‘Touch-me-not‘ plant belong? [RRB NTPC CBT - I (16/02/2021) Morning]

Correct Answer: (a) Mimosaceae
Solution:

Examples of  some plant family :- Cyperaceae - purua grass, pike-rush, sawgrass, nut grass. Acanthaceae - Justicia, Rueillia, clockvines, Odontonema etc. Malvaceae - Mallow, Hibiscus, Hollyhock, Durian, marsh mallow etc.

47. For treatment of which of the following is the bark of the Arjuna tree primarily used? [RRB NTPC CBT - I (17/02/2021) Morning]

Correct Answer: (b) Heart Disease
Solution:

Arjuna (Terminalia arjuna) is used for the treatment of coronary artery disease, heart failure, edema, angina and asthma. Neem, Aloe vera, Tulsi, Amla, and others, are used to treat various skin diseases. Herbs that help reduce inflammation include turmeric and ginger.

48. The petiole is a part of a/an ____. [RRB NTPC CBT - I (02/03/2021) Evening]

Correct Answer: (c) Tree
Solution:

Petiole - It is a stalk that connects the blade with the leaf base. It serves to transport nutrients and water that are absorbed by the roots and passed up through the xylem, to the leaf.

49. In which of the following plants is the body NOT differentiated into roots, stems and leaves? [RRB NTPC CBT - I (14/03/2021) Morning]

Correct Answer: (d) Chara
Solution:

Chara - A genus of charophyte green algae in the family Characeae. Ferns - A group of vascular plants that reproduce via spores. Marsilea - A genus of aquatic ferns that have four-leaf clover-like leaves. Deodar - A species of cedar tree that is native to the Himalayas.

50. Which of the following plants has specialised tissue for the conduction of water and other substances from one part of the plant body to another? [RRB NTPC CBT - I (07/04/2021) Evening]

Correct Answer: (b) Marsilea
Solution:

Marsilea is a genus of aquatic ferns that are found in freshwater habitats around the world. Moss is a type of bryophyte, which are nonvascular plants with rhizoids instead of roots.
Riccia is a type of liverwort. Its plant body is gametophytic. Chara is a type of green algae, which is a group of organisms that are not plants.