Question Discussion & Solution

Important functions of a database administrator are:

• Schema definition schema and physical organization modification granting of authorization for data access
• Monitoring jobs running on the database and ensuring that performance is not degraded by very expensive tasks submitted by some users.
• Routine maintenance includes activities like periodic ensuring that backup and enough freedisk space is available for normal operations and upgrading disk space as required.

Venn diagram are given bellow

Hence, option 3 is the correct answer.

After reading statements and conclusion we decide that -

i) Some basketball players are not women. → False (We do not have any information about the other basketball player they can be women or men)

ii) Not all basketball players are women.→ False (This is a possibility but we cannot say definitely)

Hence, option 4 is the correct answer.

The correct answer is Cell.

Key Points

• Cell:
  • A cell is the smallest unit capable of independent existence which can reproduce itself. Hence, Option 3 is correct.
  • All living organisms, except for viruses, are composed of one or more cells.
  • Single-cell organisms; such as, bacteria, protozoa, and other micro-organisms are termed unicellular, while plants and animals that contain many cells are termed multicellular.
  • Highly complex organisms; such as, human beings consist of billions of cells, all of which are adapted to carry out specific functions; for example, groups of these specialized cells are organized into tissue and bodily organs.
  • Although cells may differ widely in size, appearance, and function, their essential features are similar.

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Important Points

• Almost all cells perform biochemical processes, generate and process energy, and store genetic information to be passed down to future generations of cells.
• Advanced single-celled and multicelled organisms have nuclei that carry the DNA, primitive cells; such as, bacteria, have no nucleus and carry their DNA loosely in coils throughout the cells
• The number of cells in an organism varies; for example, bacteria are single-celled organisms; the average adult human body has about one hundred trillion cells.
• Cells are the structural unit of all organisms and come in a range of sizes and shapes.
• Animal cells contain only an outside cell membrane.
• In most fungi, bacteria, and plants; there is a rigid cell wall outside the membrane.
• Each cell is composed of a mass of jelly-like substance called the cytoplasm, surrounded by a membrane.

Additional Information

Concept:

Matter

• The thing which occupies space is called matter.
• The matter is made up of particles and based on the arrangement of particles matter has been classified into different states.
• The matter has 5 states, Solid, liquid, glass, Plasma, Bose - Einestine condensate.
• Solid, Liquid, and Gas are states of matter that we observe across our surroundings.
• The following table defines these three states.
   

The arrangement of particles in solid, liquid, and gas is shown in this diagram.

Explanation:

• The state of matter with a definite volume but no definite shape is liquid.
• The liquid gets itself in the shape of its container. This can be easily observed.
  • If we keep liquid in the jug it will be according to its shape.
  • The shape will change if the same liquid is poured into a glass.
• Though the volume of the liquid does not change. It will remain the same.

Therefore the correct option is liquid.