Question Discussion & Solution

Jail must have Lock other options are not necessary part of jail. There can be or cannot be prisoner in jail. Rods are not necessary jail can be a room even Jailor is not always necessary.

The correct answer is option 3 i.e Backup.

Key Points

• Protecting data by copying it from the original source to a different destination is called Backup.
  • Backups can be used to recover data after its loss from data deletion or corruption.

Additional Information​ 

• The activity of creating sectors and tracks on a hard disk is called Formatting.
• The process of unauthorised access to information system is called Hacking.
  • One who does hacking is called Hacker.
  • Hackers are mainly classified as White Hat Hackers, Black Hat Hackers, Gray Hat Hackers.
• Data diddling is the unauthorised changing of data before or during their input to a computer system.

Concept:-

• Plants have diverse varieties.
• There are more than 3 lakh plants species that have already been found in the world.
• Plants are beneficial in human life they give food, shelter and fulfil many other needs of various organisms.

Explanation:-

Bryophytes:

• Bryophytes are often referred to as the amphibians of the plant kingdom.
• Bryophytes are small, non-vascular plants.
• The reproduction of Bryophytes is via spores.
• Bryophytes are live in the soil, even though they need water for sexual reproduction this is the reason why the Bryophytes are often referred to as the amphibians of the plant kingdom.
• Bryophytes are generally classified into three coordinate phyla namely the liverworts, hornworts, and mosses.
• The following division, bryophytes, were the first land occupying or inhabiting plants.
• They fill in sodden or damp regions since they require water for fertilization.
• Consequently, they are called the creatures of land and water of the plant kingdom or the amphibians of the plant kingdom.

Thus, the first plants to inhabit the land are Bryophytes.

Additional Information 

Kingdom plants are divided into five groups- Thallophytes, Bryophytes, Pteridophytes, Gymnosperms, and Angiosperms.

Thallophyta

• The plant body is not differentiated from roots, stems, and leaves.
• They are commonly called algae.

Bryophyta

• These are small terrestrial plants.
• They show differentiation in the body design, with stem, leaf-like structures, and root-like structures.

Pteridophyta

• The plant body is differentiated into roots, stems, and leaves, apart from having a specialized tissue for conduction.

Gymnosperms

• Gymnosperms are plants with naked seeds.

Angiosperms

• Angiosperms are seed-bearing plants. Seeds develop inside tissues that get modified to form the fruit of the plant. 

The correct answer is Element.

Key Points

• An electric room heater or an electric heater used for cooking contains a coil of wire.
• The coil of wire used in electric heaters is called a heating element.
• The heating coil of the electric room heater transfers the electric energy into heat energy.
• The elements become red hot and give out heat after connecting to the electric supply.
• The amount of heat produced in a wire depends on its material used, length, and thickness.
• The coil of the electric heater is made up of nichrome.
• Nichrome consists of 80% nickel, 20% chromium.

Additional Information

• The filament is usually made of very thin tungsten wire.
  • In an incandescent bulb, an electric current is passed through a metal filament.
• A cell is a single unit device that converts chemical energy into electric energy.
  • It produces electricity capable to run smaller appliances.
• A battery usually consists of a group of cells.

Mistake Points

• A filament is a fine resistance wire the purpose of which is to emit white light. 
• An element is a resistive wire the sole purpose of which is to produce heat.