Biology
Plant Biology and Classification
1,473 Questions
Plant Biology and Classification deals with the taxonomy, evolution, and morphological features of the plant kingdom. This collection offers practice questions on plant groups, taxonomic hierarchies, and specific plant characteristics. The questions are tailored for students preparing for biology competitive exams.
Plant taxonomyPteridophytesAngiospermsPlant morphologyAlgae and bryophytesClassification systems
Plant Biology and Classification Questions
-
Rumohra adiantiformis
-
Microsorum pteropus
-
Osmunda regalis
-
Matteuccia struthiopteris
-
Pteridium aquilinum
E
Correct answer
Explanation
Its fiddleheads are used as a cooked vegetable in Japan and are believed to be responsible for the high rate of stomach cancer in Japan. It is also one of the world's most important agricultural weeds, especially in the British highlands and often poisons cattle and horses.
-
Ferns first appear in the fossil record 360 million years ago in the late Devonian period.
-
Ferns are grown to remove some chemical pollutants from the air.
-
Ferns are vascular plants similar to lycophytes.
-
They have a life cycle referred to as alternation of generations.
-
The gametophyte of ferns is a free-living organism.
C
Correct answer
Explanation
Ferns are vascular plants differing from lycophytes by having true leaves (megaphylls) which are often pinnate. They differ from seed plants (gymnosperms and angiosperms) in their mode of reproduction, lacking flowers and seeds.
-
Ambuchanania leucobryoides
-
Andreaea
-
Grimmia
-
Tetraphis
-
Sphagnum
E
Correct answer
Explanation
Sphagnum accumulations can store water, since both living and dead plants can hold large quantities of water inside their cells, plants may hold up to 1 billion times as much water as their dry weight depending on the species. The empty cells help retain water in drier conditions. Hence, as sphagnum moss grows, it can slowly spread into drier conditions, forming larger peatlands, both raised bogs and blanket bogs.
-
Mosses are small flowerless plants.
-
Lichens may superficially look like mosses.
-
Mosses absorb water and nutrients through stems.
-
Moss gametophytes have stems which may be simple or branched.
-
They do not have proper roots.
C
Correct answer
Explanation
Botanically, mosses are non-vascular plants in the land plant division Bryophyta. They are small (a few centimeters tall) herbaceous (non-woody) plants that absorb water and nutrients mainly through their leaves and harvest carbon dioxide and sunlight to create food by photosynthesis.
-
Discelium
-
Diphyscium
-
Colura zoophaga
-
Folioceros
-
Ptilidium ciliare
C
Correct answer
Explanation
Colura zoophaga is a small epiphytic liverwort . It possesses elongated water sacs formed by the fusion of the upper leaf margin rolling inward down to the rest of the leaf. A funnel-shaped channel at the lower leaf margin leads to a small opening into the water sac and is covered by a movable lid that only open inward. It is because of this bladder-like configuration that these traps have been compared to those of Utricularia.
-
Flabellidium spinosum
-
Flatbergium sericeum
-
Fontinalis
-
Funaria hygrometrica
-
Hygrohypnum styriacum
A
Correct answer
Explanation
Flabellidium spinosum was a species of moss in the Brachytheciaceae family. It was endemic to Bolivia. It is also known as the Santa Cruz Bryophyte.
-
Coralline algae
-
Claudea
-
Plocamium
-
Rhodoliths
-
Nori
A
Correct answer
Explanation
Coralline algae are red algae in the order Corallinales. They are characterised by a thallus that is hard because of calcareous deposits contained within the cell walls. The colours of these algae are most typically pink, or some other shade of red, but other species can be purple, yellow, blue, white or gray-green.
-
C. merolae
-
A. hypnoides
-
Galaxaura
-
Gelidiella
-
Nemalion
A
Correct answer
Explanation
C. merolae is a club-shaped, unicellular red algae that lives in highly acidic environments and in warm conditions. Merolae has a single chloroplast and a single mitochondrion, but lacks a vacuole and a cell wall. The organism's genome was the first full algal genome to be sequenced in 2004. Its plastid was sequenced in 2000, 2003 and its mitochondrion in 1998.
-
Adalbert Geheeb
-
Edward Wilber Berry
-
Johann Reinhold Forster
-
Viktor Ferdinand Brotherus
-
William Mitten
E
Correct answer
Explanation
William Mitten was the premier bryologist in the second half of the nineteenth century. A pharmaceutical chemist by trade and never a professional botanist, he classified and named thousands of bryophyte specimens which came into Kew Gardens from around the vast British empire.
-
The geological record of the thallophytes is incomplete.
-
The simplest thallophytes include sulphur containing bacteria.
-
The final class of the thallophyta is the fungi.
-
The second subphylum of the thallophytes is called the heterophytic thallophytes.
-
All the thallophytes produce chlorophyll.
B
Correct answer
Explanation
The thallophytes are in the most primitive plants, lacking roots, stems, leaves, and conducting cells. The simplest thallophytes are in the subphylum of autophytic thallophytes, which include blue-green bacteria (or cyanobacteria, formerly known as blue-green algae), diatoms, and algae.
-
Angiopteris evecta
-
Adiantum tenerum
-
Asplenium listeri
-
Asplenium polyodon
-
Blechnum procerum
C
Correct answer
Explanation
Asplenium listeri, commonly known as the Christmas Island Spleenwort, is a species of fern in the Aspleniaceae family. It is endemic to Christmas Island, an Australian territory in the north-eastern Indian ocean.
-
Chara
-
Hydrodictyon
-
Chlorella
-
Spirogyra
-
Filamentous
A
Correct answer
Explanation
Chara often grows at the bottom of lakes in fresh and also some brackish waters one to six metres deep. Chara is common in freshwater areas with silty or sandy beds. It is usually more noticed in droughts when the water level drops.
-
Vegetative reproduction-Bryophyllum
-
Symbiosis-Rhizobium
-
Hygroscopic-Somneratia
-
Floating and Balancing-Pistia
C
Correct answer
Explanation
Somneratia roots are not modified to perform hygroscopic function. They perform respiratory function.
-
Saprophytes
-
Halophytes
-
Acrophyte
-
Pterophyte
B
Correct answer
Explanation
Plants which bears pneumatophores are called Halophytes
-
Mollusca
-
Lichens
-
Greasewood
-
Euhrychiopsis lecontei
-
Stoneflies
D
Correct answer
Explanation
Euhrychiopsis lecontei and its assumed keystone effects on aquatic plant species diversify by foraging on nuisance Eurasian Watermilfoil.