There are some objects in this Universe, which are having their own light. Again, there are also some objects, which have no light of their own. Depending on this property, objects are divided into two types, that is, luminous and no luminous. 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 a 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?
We know that the light undergoes refraction when it passes from one medium to another. Sometimes it bends towards the normal and sometimes bends away from the normal. Sam passes a beam of light from water to a glass slab and observes the deviation of the light. The ray of light bends ______.
The sounds from the surrounding entering into our ear are collected by pinna. The sound which enters into our ear is not of high amplitude. They are amplified inside our ear. In which one of the following parts of the ear sounds get amplified?
David tries to float in the air with the help of a glider. He remains unsuccessful even after several attempts. On examining reason for his failure, David finds out that the air pressure of the region is responsible for it .The air pressure of the region has been ____ than 101.3 kpa.
Before 1957, communication was a difficult task. This problem has been solved by launching satellites into the earth's orbits. What is the name of the satellite, which is used for the purpose of weather forecasting?
Drik went to a visit to a national park. He had not taken water bottle with him. Due to intense heat, he was feeling thirsty and could not resist himself from drinking water from the river. The very next day he was suffering from lose motion and vomiting, and the doctor diagnosed it as diarrhea. Which organism was responsible for this?
In plants fertilization takes place by transfer of pollen grains. This transfer of pollens is called pollination. Pollination may be either self or cross pollination. The self-pollination is also called______.
All the living organisms need food for their survival. They get their food either from the plants or from other living organisms. The organized method by which human being produce their food is called______?
This organism reproduces by sexual method, forming a heterokaryotic structure. It mostly grows on food particles and on other eatables. The figure given below represents which one of the following microorganism?
The entire living and nonliving organisms together constitute the ecosystem of a place. The living component includes plants and animals and nonliving components are air, water and soil. The living components of the ecosystem are known as:
There are many species, which are on the verge of extinctions. But, among them there are few species, which are considered as the most endangered one. Which one of the following is the most endangered species?