Question Discussion & Solution

There are 4 library functions provided by C defined under header file to facilitate dynamic memory allocation in C programming. They are:

• malloc()
• calloc()
• free()
• realloc()

The correct answer is Alt+F4.

Key Points

• Alt+F4 is a shortcut key that is used to close the currently active window.
• To stop the current window this shortcut has been used.
• For example: if we pressed the shortcut key now while reading this page on your computer browser, it would close the browser window and all open tabs.

How to Use this Shortcut Key

• To use the keyboard shortcut Alt+F4, press Alt andF4 Key simultaneously.

• While running any program in Microsoft Windows, if Alt+F4 is pressed, it closes the currently active program.
• If no programs are open or we are at the desktop, pressing Alt+F4 opens the Shutdown window.

​

Additional Information

Functions of other shortcut Keys in computer

• Alt + Tab
  • Alt+Tab  can be used to switch to any running program that has an application-level window.
  •  It can be used to alternate between the two most recent tasks.
  •  It acts as an alternate between a full-size window and the desktop.
• Alt+E
  • ​It is a shortcut key most often used to open the Edit file menu option for programs supporting a file menu.
  • In Google Sheets, pressing Alt+E opens the Edit file menu option.
  • In Chrome, pressing Alt+E opens the Chrome menu.
  • In Microsoft Internet Explorer and Mozilla Firefox, pressing Alt+E opens the Edit file menu.
• F1
  • Used as the help key in almost every program, it opens a help screen when this key is pressed.
  • Windows Key + F1 opens the Microsoft Windows help and support center.
  • It opens the Task Pane.
• Cntrl+1
  • Ctrl+1 is a shortcut key most often used to switch to the first tab in a browser or other programs with tab support.
  • The "1" (one) used with this shortcut is the "1" at the top of the keyboard, not on the numeric keypad.
  • It is also known as  Control 1 and C-1.

The correct option is Most of the bees in the hive are worker bees.

• Every honey bee colony comprises a single queen, a few hundred drones and several thousand worker castes of honey bees.
• A queen bee is the only female bee in the hive that gets to reproduce.
• Worker bees are all female and are all offspring of the queen. 
• Queen is a fertile, functional female, the worker is a sterile female and the drone is a male insect.
• Queen and worker develop from the fertilized egg while drone develops from an unfertilized egg.
• Further differentiation of queen and worker depends on the quality and quantity of food that is fed to the queen or worker larvae.

Explanation:

​Every beehive has one male bee and many female bees → Inorrect.

Most of the bees in the hive are worker bees → Correct

The study of honey bee is sericulture → Inorrect.

Beehives are octagonal in shapes→ Incorrect. (Hexagonal)

​Additional Information

The queen:

• ​There is only one queen in a colony and considerably larger than the members of other castes.
• Swarming is the natural method that honeybee colonies use for multiplying their colonies.
• The old queen is killed as soon as the new queen is fertilized.
• The phenomenon of raising a queen in the off-season is called supersedure.
• The normal lifespan of a queen is 3 years.

​The drone:

• ​The drones are male bees with no sting.
• They are much larger and stouter than either the queen or the workers.
• Their only function is to impregnate the young queen a task which they are unable to perform until they are about 10 days of age.
• They also help in the maintenance of hive temperature. 
• The drones are produced by unfertilized eggs of the queen, or by those workers which take up the reproductive function due to the absence of a queen in a colony.
• The normal lifespan of a drone is 57 days. 

​The worker:

• ​Smallest inhabitants of the beehive.
• They are imperfect females incapable of laying eggs.
• Worker bees primary duties are cleaning, feeding developing larva once hypopharyngeal glands develop, ripening of honey, secreting/moulding of wax into combs.
• The lifespan of a worker is about 4 weeks during the active season and 8 to 10 weeks during the less active season.
• On certain occasions when the colony is in need of a queen, some of the workers start laying eggs from which only drones are produced.
• These workers called laying workers.

The correct answer is Vitamin A.

• Vitamin A causes Night Blindness.

Key Points

• Night blindness is a type of vision impairment also known as nyctalopia. People with night blindness experience poor vision at night.
• Vitamin was first invented by FG Hopkins.  However, the term vitamin was coined by C Funk. 
• Good sources of vitamin A include cheese, eggs oily fish.

Additional Information

• Vitamin B₁₂ deficiency may lead to a reduction in healthy red blood cells (anaemia). 
• Vitamin C is found in citrus fruits and vegetables.
  • Scurvy results from a deficiency of vitamin C in the diet.
• The signs and symptoms of vitamin D deficiency include Fatigue, Bone pain, muscle weakness, muscle aches, or muscle cramps.
  • Rickets is caused due to deficiency of vitamin D
• Vitamin E deficiency can cause nerve and muscle damage loss of body movement control, muscle weakness, and vision problems.

In this question shows that Lotus, Rose and Lily are kind of flower. So Marigold is also kind of flower but apple is the fruit, Red is color and flower is flower.

So most closely word is Marigold.

Hence, option 2 is the correct answer.