Organic matter is important for crop production because: It helps in improving soil structure. It helps in increasing water holding capacity of... View Article
Antibiotics are useless against viral infections. This is because viruses are so simple that they use their host cells to perform their... View Article
Disease that results from an infection transmitted to humans and other animals by blood-feeding anthropods, such as mosquitoes, ticks, and fleas.... View Article
Epithelial cells with cilia are found in the respiratory system of our body. Minute hair like structures lining the surface of a cell are... View Article
In females, the uterine wall thickens to receive the fertilized egg The egg gets fertilized with sperm at oviduct to form a zygote. For the... View Article
LPG is a better domestic fuel than wood. LPG has more calorific value and produces no pollution. So it is better domestic fuel than wood.... View Article
Autotrophs Heterotrophs Some organisms such as plants make their own food from simple substances. They are called autotrophs and the mode of... View Article
It heats up the rocks during the day. Heating causes the rocks to expand. During night, the rocks cool and contract. Different parts of a rock... View Article
The WHO defines health as a state of “complete physical, mental and social well-being and not merely the absence of disease or infirmity.”... View Article
True Anabaena is a genus of cyanobacteria or blue-green algae. It belongs to the kingdom Monera. They have the nitrogen-fixing capability.... View Article
Global warming is a gradual increase in the earth’s temperature generally due to the greenhouse effect caused by increased levels of carbon... View Article
Even small organisms are important in an ecosystem because every organism forms a part of food chain/food web/ecosystem. Every little animal... View Article
False Plastics are non-biodegradable. Most plastics are non-biodegradable mainly because plastic is widely used because of its low cost,... View Article
True Coke is a fuel with few impurities and a high carbon content, usually made from coal. It is the solid carbonaceous material derived from... View Article
False Explanation Compressed natural gas (CNG) is a less polluting fuel than petrol and diesel. CNG (Compressed Natural Gas) is considered to be... View Article
Hybridization is the method of mating two organisms from separate species in order to produce an organism that possesses the characteristics of... View Article
True A leaf whose blade is divided into two or more distinct leaflets is called compound leaf. Almost all ferns have pinnate leaves with one... View Article
Excessive burning of fossil fuels is a major cause of Global Warming. Global warming is the phenomenon of a gradual increase in the temperature... View Article
When heated in air, coal burns and produces mainly carbon dioxide gas. When coal is burned, it reacts with the oxygen in the air. This chemical... View Article
