There are some objects in this Universe that have the light of their own, but there are other objects having no light of their own. Depending on this property, there are two types of objects, luminous and nonluminous. Luminous or Non-Luminous nature of the object depends on which one of the following properties?
Robert and Carlos went to see movie in a cinema hall. They observed that the beam of light was focused on the screen from behind through a hole, to obtain the images on the screen. What was the nature of image on the screen of the cinema hall?
When we immerse a spoon in a glass containing water, it appears bent at the point, it enters in the water. This apparent bending of the spoon is due to______.
Take four jars with different amount of water. Hit the rim of the jars with the pencil. In which one of the following case, the intensity of sound will be maximum?
Different persons produce different types of sound. This is possible because that each individual has vocal chord, that vibrates differently in each individual. \hat is the length of the vocal chord of man?
The sound from our ear is carried to our brain, where it is interpreted and we are able to hear and identify the sounds. Which part of the ear carries the sound message to the brain?
Mary went to the restaurant and drank a cold drink with the help of straw. She realised that it was easy for her to drink with the help of straw, rather than directly from the bottle. Which one of the following is the possible reason for this?
A small boat carrying loads does not sink in the river, at the same time an iron pillar of same weight sinks into the river. The reason for this is_______.
There are thousands of galaxies in this universe. Each galaxy has millions of stars, as well as, planets and other celestial bodies. Which of these is a galaxy located in the constellation Ursamajor?
There are various stages of the life of the stars. During this stage, the stars undergo various changes in its feature. The second stage of the life of the star is called:
All the planets have their own natural satellites revolving around them in fixed orbit. Phobos and Diemos are also the natural satellite of one of the planets. Name the planet.
An object is moving in the vertically upward direction, which is normal to the plane. The net work done by the object when it reaches a height of 35 m is _______.
Rojer takes a rod and connects its one end with the electric current. He finds the rod behaves like a magnet and exerts attractive force on magnetic material, such as, iron and nickel. The force which is being exerted by the rod is known as_______.
Before 16th century, when there was no microscope, nothing much was known about the cell. After the invention of microscope in the early part of 17th century, the structure of cell came to light. Can you name the person who discovered the cell?
As we prepare our food in our kitchen, plant cells also has kitchen to prepare their food. Name the organ, which is also called the kitchen of the cell.
We know that the milk can be changed into the curd. This conversion is done by the bacteria. Similarly, there are many such organisms useful to us. The bacteria, which convert the milk into the curd is shown in the figure given below. What is the name of the bacteria?
The organism which is transformed from single cellular to multicellular in adverse condition is shown in the figure given below. What is the name of the organism?
There are different methods of cell division in the multicellular organisms, which helps in its growth and development. The method of cell division, which takes place in the reproductive cell for reproduction is:
The male reproductive organ is testis. It lies in the pouch like structure called scrotum. The tube like structure which carries sperm from testis to outside is called
If the trait X exists in 10% of a population of an asexually reproducing species, and a trait Y exists in \[60%\] of the same population, which trait is likely to have arisen earlier?
There are different methods of agriculture. Large scale food is produced and buffer stock is created. The agriculture for the fulfillment of own requirements is called:
Weeds are the unwanted plants, which grow along with the crop and share nutrients, water and Sunlight with the crops. We have to remove these weeds for proper growth of crops. It can be done either, by handpicking or with the help of chemicals. Which one of the following chemicals given below is a weedicides?
Some algae are unicellular and some are multicellular. Some have chlorophyll, so they can manufacture their own food. Which one of the following is a multicellular algae?
One of the incurrable diseases is AIDS. It is caused by virus. In this disease virus damages the immunity system of the individual. Which one of the following virus causes AIDS?
Some of the antibiotics are prepared from the microorganism and they are used for making vaccination. The first ever antibiotics prepared by Alexander Fleming in 1929 is: