Lysosomes are single membrane bound cellular organelles. They possess many hydrolytic enzymes that destroy any foreign material inside the cell... View Article
Forests serve as a carbon sink by absorbing atmospheric carbon dioxide during photosynthesis. Since carbon dioxide is a greenhouse gas,... View Article
False Oxygen in air is an inexhaustible natural resource, as it is present in unlimited quantity in nature and cannot be exhausted by human... View Article
he Mathura oil refinery is located at Mathura in Uttar Pradesh. It is a refinery of Indian Oil which procedures low and high Sulphur crudes and... View Article
External fertilization in an aquatic environment protects the eggs from drying out. Female fish releases eggs into water and male fish releases... View Article
Fossil fuels can be made in the laboratory. False Fossil fuels are made from decomposing plants and animals. These fuels are found in the Earth's... View Article
Syndrome means a group of health problems that make up a disease. AIDS (Acquired Immune Deficiency Syndrome) is not one disease but a set of... View Article
True Explanation Plants belonging to Division Thallophyta, Bryophyta and Pteridophyta do not produce flowers. Their structures for sexual... View Article
True In five kingdom classification all prokaryotes, that is, unicellular organisms without a well-defined nucleus are grouped under Monera.... View Article
Bacterial cells are primitive cells hence, called as prokaryotic cells. They do not possess membrane bound organelles as mitochondria, lysosomes,... View Article
(i) Sulphur dioxide (ii) Nitrogen dioxide Acid Rain as the name suggests can be said to be the precipitation of acid in the form of rain in the... View Article
Coal is black and hard as stone. It is one of the fuels used to cook food. Earlier, it was used in railway engines to produce steam to run the... View Article
True They are limited in number and can be exhausted as a result of human activities, so it is a exhaustible natural resource. Some are already... View Article
True It is obtained as a by-product in the process of making coke. Though its colour is the same as coke, tar is a highly viscous liquid. It... View Article
Amoeba is a unicellular organism that has the ability to change its shape. They are usually found in water bodies such as ponds, lakes and... View Article
Fossil fuels are formed from the dead remains of living organisms. The formation of fossil fuels is a very slow process, it takes millions of... View Article
In plants, the movements are usually at the cellular level and hence a far less amount of energy is required by plants. Animals need to move from... View Article
Lichens Lichen is the association between blue-green algae and fungi. Both the partners benefit from this relationship hence, it is called as... View Article
a) Protozoa Protozoa are unicellular, eukaryotic, heterotrophic organisms. They are either free-living or parasites. There are around 65000... View Article
