Question Discussion & Solution

The correct answer is Flower.

• Flower is known as the reproductive part of a plant.
  • Plant reproduction is accomplished by sexual or asexual reproduction.
  • The male part of a flower is known as androecium.
  • The stamens in the flower of a seed plant collectively called the androecium.
  • The female part of a flower is known as gynoecium.
  • The process of transfer of pollen grains from the anther to stigma is called pollination.
  • Pollination is possible only with the help of pollen agents such as insects, birds, bats; water; and wind.
  • In sunflowers, pollination is occurred by honeybee.
  • In pepper, pollination is occurred by rain.
• ​Root is part of a vascular plant that normally lies below the surface of the soil.
  • Roots help for the absorption of water and dissolved minerals from the soil.
• The stem helps to conduct water, minerals, and food to different parts of the plant.

The correct answer is View.

• Slide Master is a tool used in Microsoft PowerPoint that allows you to make changes to all cells in one go by simply adjusting the Slide Master.
• The slide master is present under the View Tab, it can be accessed by navigating to View > Master > Slide Master.
• Slide master allows you to modify background, rearrange placeholders and Customize text formatting among others.
• Each presentation has at least one slide master, but there can be more than one slide master also. 

The correct answer is the 15th Bengal Native Infantry.

• The battalion that rebelled at Nasirabad in 1857 was the 15th Bengal Native Infantry.
  • The first rebellion in Rajasthan took place on 28 May 1857 at Naseerabad
  • News of Meerut Rebellion AGG (Agent to Governor-General) George Patrick Lawrence and he sent the 15th Bengal Native Infantry based at Ajmer to Nasirabad, causing discontent among the soldiers.
  • Soon the news of the revolt of the soldiers reached the soldiers in Nasirabad as well and on 28 May 1857, the soldiers of the Native Infantry revolted in Nasirabad.
  • The soldiers of the 30th Native Infantry also joined in and after burning and capturing the soldiers of the cantonment left for Delhi.

Additional Information

6 British Cantonments in Rajasthan are: 

The correct answer is Option(2).i.e.Alpha Decay.     

• In radioactivity, the emission consists of the Helium nucleus sustains under Alpha Decay. 
• Alpha Decay: 
  • It is basically responsible for the emission of the Helium nucleus. 
  • An alpha particle is consists of two neutrons & two protons which is the same as a helium nucleus.
  • We generally use 24He to implement an alpha particle which has a 2+ charge.
  • The original atomic number of the atom decreases by two (because of the loss of two protons), and its mass number decreases by four (because of the loss of four nuclear particles) when a radioactive atom throws down an alpha particle. 
• Emission of Alpha Particle: 
  •  The emission of an alpha particle can be present with a chemical equation: 
  • For example, the alpha-particle emission of uranium-235 is as follows:
       ²³⁵U₉₂→⁴He₂ + ²³⁵Th₉₀  

The correct answer is Solar cells.

Key Points

• A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect.
• Photovoltaic cells consist of two or more layers of semiconductors with one layer containing positive charge and the other negative charge lined adjacent to each other.
• Sunlight, consisting of small packets of energy termed as photons, strikes the cell, where it is either reflected, transmitted or absorbed.
• When the photons are absorbed by the negative layer of the photovoltaic cell, the energy of the photon gets transferred to an electron in an atom of the cell.
• With the increase in energy, the electron escapes the outer shell of the atom.
• The freed electron naturally migrates to the positive layer creating a potential difference between the positive and the negative layer.
• When the two layers are connected to an external circuit, the electron flows through the circuit, creating a current.
• Advantages of Photovoltaic Cells:
  • ​Environmental Sustainability
  • Economically Viable
  • Accessible
  • Renewable
• Disadvantages of Photovoltaic Cells:
  • ​The efficiency of solar panels is low compared to other renewable sources of energy.
  • Power generated gets reduced during cloudy weather.
  • Long-range transmission of solar energy is inefficient and difficult to carry.
  • Photovoltaic panels are fragile and can be damaged relatively easily.