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All questions of Classification of Plant Kingdom for UPSC CSE Exam

Main function of lenticel is
  • a)
     transpiration
  • b)
     guttation
  • c)
     gaseous exchange
  • d)
     both [a] & [c]
Correct answer is option 'C'. Can you explain this answer?

Shreya Desai answered
The lenticels functions as a pore, providing a pathway for the direct exchange of gasesbetween the internal tissues and atmosphere through the bark, which is otherwise impermeable to gases.The lenticels help in the gaseous exchange between the atmosphere and the internal tissue of the stem. The lenticels also helps in transpiration called as the lenticular transpiration.Lenticels are a portions of periderm with numerous intercellular spaces and loosely organized cells

 Cloves, used as a spice, are derived from which of the following plant parts? 
  • a)
     Seeds
  • b)
     Fruits
  • c)
     Flower buds
  • d)
     Young leaves
Correct answer is option 'C'. Can you explain this answer?

Janhavi Bajaj answered
Cloves are the rich, brown, dried, unopened flower buds of Syzygium aromaticum, an evergreen tree in the myrtle family. The name comes from the French "clou" meaning nail. Cloves come from Madagascar, Indonesia and Sri Lanka. Cloves are used in spice cookies and cakes.

Which plant kingdom can survive both on land and in water?
  • a)
    Tracheophyta
  • b)
    Pteridophyta
  • c)
    Thallophyta
  • d)
    Bryophyta
Correct answer is option 'D'. Can you explain this answer?

Nidhi Pillai answered
The sperm of bryophyte (antherozoids) are flagellate and need water to swim to the eggs. In other words, as these plants need water for reproduction unlike other plants, they are called as amphibians. Amphibians are those organisms which live on both land and in water.

Total number of ATP consume during Kreb's cycle is
  • a)
     0              
  • b)
     1
  • c)
     2                          
  • d)
     3
Correct answer is option 'C'. Can you explain this answer?

Saranya Basak answered
The Krebs cycle produces two molecules of ATP for every molecule of glucose. The Krebs cycle also produces eight molecules of NADH and two molecules of FADH2 per molecule of glucose.

Which one of the following plant nutrients is not supplemented in the soil for growing legumes?
  • a)
    Nitrogen
  • b)
    Potassium
  • c)
    Phosphorus
  • d)
    None of these
Correct answer is option 'B'. Can you explain this answer?

- Growing legume cover crops is one of the most important tools for increasing soil fertility in an organic garden.
- The bacteria take gaseous nitrogen from the air in the soil and feed this nitrogen to the legumes; in exchange the plant provides carbohydrates to the bacteria.

Fungi are plants that lack:
  • a)
    Oxygen
  • b)
    Carbon dioxide
  • c)
    Chlorophyll
  • d)
    None of these
Correct answer is option 'C'. Can you explain this answer?

Fungi are not plants because they lack chlorophyll, which is a key characteristic of plants. Chlorophyll is a pigment found in the chloroplasts of plant cells that is responsible for capturing sunlight and converting it into energy through the process of photosynthesis. Fungi, on the other hand, obtain their nutrients by absorbing organic matter from their environment, such as decaying plant and animal material.

Here is a detailed explanation of why fungi are not plants:

1. Absence of Chlorophyll:
Chlorophyll is essential for plants to carry out photosynthesis, the process by which they convert sunlight into energy. Fungi do not possess chlorophyll and are incapable of performing photosynthesis. Instead, they obtain their energy by breaking down organic matter through the secretion of enzymes and absorbing the resulting nutrients.

2. Mode of Nutrition:
Fungi are heterotrophic organisms, meaning they cannot produce their own food and rely on external sources for nutrients. They are decomposers, playing a crucial role in the ecosystem by breaking down dead organic matter and recycling nutrients. In contrast, plants are autotrophic organisms that can synthesize their own food through photosynthesis.

3. Cell Wall Composition:
The cell walls of fungi are primarily composed of chitin, a tough and flexible polysaccharide. In contrast, the cell walls of plants are composed of cellulose. This difference in cell wall composition is another distinguishing feature between fungi and plants.

4. Reproduction:
Fungi have a unique mode of reproduction that sets them apart from plants. While plants reproduce through seeds or spores produced within flowers or cones, fungi reproduce through the production of spores, which are released into the environment to establish new fungal colonies.

5. Taxonomic Classification:
Fungi belong to the kingdom Fungi, which is distinct from the kingdom Plantae. The kingdom Fungi includes diverse organisms such as mushrooms, yeasts, molds, and lichens. This taxonomic classification further emphasizes the biological differences between fungi and plants.

In conclusion, fungi are not plants because they lack chlorophyll, have a different mode of nutrition, possess cell walls made of chitin, reproduce differently, and are classified in a separate kingdom. These characteristics differentiate fungi from plants and highlight their unique biological features.

 Cork is formed from
  • a)
     phellogen
  • b)
     vascular cambium
  • c)
     phloem
  • d)
     xylem
Correct answer is option 'A'. Can you explain this answer?

Akanksha Ahuja answered
The meristematic cell layer which is responsible for the development of the periderm is called phelloge. It produces cells both in and outwards. Cells which grow inwards will be phelloderm, and cells which develop outwards will be phellem or cork

A plant that has seeds but no flowers and fruits?
  • a)
    Bryophyte
  • b)
    Gymnosperms
  • c)
    Mosses
  • d)
    Pteridophyte
Correct answer is option 'B'. Can you explain this answer?

Saanvi Iyer answered
Gymnosperms evolved to have seeds but do not have flowers. Examples of gymnosperms include the Redwood, Fir, and Cypress trees. Gymnos means "naked" in Greek; the seeds of gymnosperms are naked, not protected by flowers. Flowering plants, or angiosperms, evolved to have vascular tissue, seeds, and flowers.

Roots develop from parts of the plant other than radicle are called
  • a)
     tap roots
  • b)
     fibrous roots
  • c)
     adventitious roots
  • d)
     nodular roots
Correct answer is option 'C'. Can you explain this answer?

Nishanth Jain answered
Adventitious roots are the type of roots that are grown from different parts of plants such as stem, leaf and tubers etc.
These are used in vegetative propagation.
These are mostly grown on root tubers and the apex of these tubers contains numerous adventitious roots which grow into new plants.
Read more on Brainly.in - https://brainly.in/question/147876#readmore

Which one of the following process releases a carbon dioxide molecule?
  • a)
     Glycolysis
  • b)
     Lactic acid fermentation
  • c)
     Alcohol fermentation
  • d)
     Hydrolysis of glycogen
Correct answer is option 'C'. Can you explain this answer?

Shreya Mishra answered
Lactic acid fermentation is a metabolic process by which glucose and other six-carbon sugars (also, disaccharides of six-carbon sugars, e.g. sucrose or lactose) are converted into cellular energy and the metabolite lactate.

'Anemophily’ is pollination by: 
  • a)
    Birds
  • b)
    Wind
  • c)
    Ants
  • d)
     Bats
Correct answer is option 'B'. Can you explain this answer?

Saanvi Iyer answered
Abiotic pollination refers to situations where pollination is mediated without the involvement of other organisms. The most common form of abiotic pollination, anemophily, is pollination by wind. This form of pollination is predominant in grasses, most conifers, and many deciduous trees.Of the 20% of abiotically pollinated species, 98% are anemophilous and 2% hydrophilous, being pollinated by water.

Which among the following is not among Micronutrients required for plants?
  • a)
    Molybdenum
  • b)
    Magnesium
  • c)
    Manganese
  • d)
    Zinc
Correct answer is option 'B'. Can you explain this answer?

Ipsita Dey answered
In order for a plant to grow and thrive, it needs a number of different chemical elements. The most important are: Carbon, hydrogen and oxygen – Available from air and water and therefore in plentiful supply Nitrogen, phosphorus, potassium (a.k.a. potash) – The three macronutrients and the three elements you find in most packaged fertilizers.
Sulfur, calcium, and magnesium – Secondary nutrients
Boron, cobalt, copper, iron, manganese, molybdenum and zinc – Micronutrients

ESMA  
  • a)
    Essential Service Milestone Act
  • b)
    Essential Service Maintenance Act
  • c)
    Essential Service Management Act
  • d)
    Essential Service Migration Act
Correct answer is option 'B'. Can you explain this answer?

Essential Service Maintenance Act
The correct answer is option 'B', Essential Service Maintenance Act. This act is designed to ensure the maintenance of essential services during times of crisis or emergencies. Here is a detailed explanation of this answer:

Definition:
The Essential Service Maintenance Act (ESMA) is a legislation that empowers the government to declare any service as "essential" for the maintenance of public order. This act allows the government to prohibit strikes and lockouts in essential services to ensure their uninterrupted operation.

Objective:
The main objective of ESMA is to prevent disruptions in essential services such as healthcare, transportation, communication, and public utilities during times of crisis. By prohibiting strikes and lockouts in these sectors, the act aims to safeguard the interests of the public and ensure the smooth functioning of vital services.

Implementation:
ESMA is typically invoked by the government when there is a threat of disruption in essential services due to strikes or other forms of industrial action. Once declared, the act empowers the authorities to take necessary measures to maintain the continuity of essential services and prevent any disruptions that may affect public order.

Controversies:
While ESMA serves an important purpose in safeguarding essential services, it has also faced criticism for restricting the rights of workers to strike and bargain collectively. Some argue that the act infringes on the fundamental rights of workers and limits their ability to negotiate for better working conditions.
In conclusion, the Essential Service Maintenance Act plays a crucial role in ensuring the uninterrupted operation of essential services during emergencies. While it is a powerful tool for maintaining public order, it is important to strike a balance between the interests of the public and the rights of workers.

Plants which are adapted to grow in soils containing high concentration of salt are known as:
  • a)
    Xerophytes
  • b)
    Mesophytes
  • c)
    Halophytes
  • d)
    Thallop
Correct answer is option 'C'. Can you explain this answer?

Gargi Saha answered
Halophytes are salt-tolerant plants that grow in waters with high salinity, such as in mangrove swamps, marshes, seashores and saline semi-deserts. Only two per cent of the plant species found on the Earth are halophytes.

 Alternate type of phyllotaxy is found in
  • a)
     china rose
  • b)
     mustard
  • c)
     sunflower
  • d)
     all of these
Correct answer is option 'D'. Can you explain this answer?

Aashna Singh answered
In alternate (or spiral) type of phyllotaxy, only one leaf is borne at each node and leaves are arranged alternatively giving a spiral form. Example chinarose, mustard & sunflower.

'Saffron’ is obtained from which among the following parts of the plant?
  • a)
     Stigma
  • b)
    Anther
  • c)
     Stamen
  • d)
    Pollen
Correct answer is option 'A'. Can you explain this answer?

Janhavi Bajaj answered
Saffron is obtained by hand picking the yellow stigma and style (the female reproductive part) of plant Crocus sativus that normally grows in the Sub Himalayan region. Thousands of plants are needed to collect one gram of saffron.

 Day neutral plants relate to
  • a)
    flowering in all possible photoperiods.
  • b)
    loss of activity during day time.
  • c)
     overactive during day time.
  • d)
     no flowering in any photoperiods.
Correct answer is option 'A'. Can you explain this answer?

Short day plants are those plants that begin flowering when the days are shorter than their critical day length. They require the long period of darkness and the short period of light to flower. Long day plants are those plants that begin flowering when the days are longer than their critical day length. They will flower when they are exposed to the short period of darkness and the long period of light. Day neutral plants do not depend upon the amount of darkness or daylight hours for flowering. They flower independent of day length. Examples of day neutral plants are sunflower and tomato. 
Thus, the correct answer is option B

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