Question Discussion & Solution

Concept:

The nucleus of the Cell

• The cell is the basic building block of all living beings. 
• The nucleus is the special structure located generally at the center of the cell. 
• The nuclear membrane separates the cytoplasm from the nucleus. 
• The nucleus contains a central part called nucleolus and chromosomes. 
• Chromosomes and nucleolus coexist in the nucleus. Chromosomes are not present in the nucleolus.

Chromosomes and Genes

• Chromosomes carry genes and help in the inheritance or transfer of characters from the parents to their children. 
• The chromosomes can be seen only when the cell divides.
• The credit for the discovery of chromosomes goes to Strasburger as he first described the chromosome structure seen in the nucleus during cell division.
• Usually, chromosomes are rod-shaped, elongated, or dot-like in shape with sizes varying from 0.5 to 32 micrometer.
• In humans, 23pairs of chromosomes are found i.e. 46 in numbers.

Conclusion:

• Chromosomes are present in the nucleus of the cell. So, all the given options are wrong. 
• The correct option is None of these.

Additional Information

• The cell membrane is also known as the plasma membrane. 
  • It is a porous structure that allows the exit and entry of certain materials according to its requirement. 
  • This is the major function of the cell membrane. 
• The cytoplasm is between the cell and the nucleus.
  • Cell organelles like mitochondria, Golgi bodies, ribosomes, etc. are present in the cytoplasm. 
  • Mitochondria is called the powerhouse of cells and is responsible for cellular respiration. 
  • vacuole is open space between cell which is used for storing food. 
• Plastids are double-membrane organelles found in the plant cell. They contain pigments that help the plant in photosynthesis.

The correct answer is Desktop Publishing.

Key Points

• DTP stands for Desktop Publishing.
• It is a publishing software used to create high-quality printed material for individuals, businesses, and organizations.
• The DTP software provides good control over the design and layout of a page as compared to the word processor. 
• Types of DTP:
• DTP is divided into five categories, which are
  • Software for page layout
  • Graphics for software
  • Website for software editing image
  • Website for a publishing system
  • Word processing app

The correct answer is option 4, i.e. Ocean, snow and rain, underground water.

• Water resources available on earth are :
  • Freshwater: Glaciers, ice caps, and snow
  • Groundwater
  • Oceans, seas, streams, rivers, lakes, ponds
  • Wetlands- lagoons, swamps, and marshes
  • Precipitation- Rain, snow, and dew

Hence, from the above points, we can clearly infer that the resources of water on the earth are ocean, snow and rain, underground water.

The correct answer is Pavo cristatus.

The correct answer is Sirohi.

Key Points

• In Battle of Kayadara 1178, fought between Muhammad of Ghori and Bhimdev II the battle took place at Kayadra near Mount Abu (Sirohi District).

Important Points

• The battle of Kayadara (1178):
  • Gujarat was ruled by Mularaja II (1175-78: Chalukyan Dynasty) he was young at the time of Coronation.
  • In 1178, Mohd. Ghori crossed the desert and marched towards Gujarat.
  • Naikidevi (Mother of Mularaja) met forces of Ghori at Kayadara (near Mount Abu).
  • Naikidevi inflicted a major defeat to Muhammad Ghori and he was forced to retreat.
  • In 1178 itself, Bhima II, brother of Mularaja II succeeded Mularaja II.
  • As both the brothers occupied the throne during 1178, hence some historians also credit Bhima II with defeating Mohd. Ghori.