ASSESSMENT: NCERT QUESTIONS WITH ANSWERS
The reflex action is an involuntary action which goes on automatically. We don’t have any control on this type of action. Walking, on the other hand is a voluntary action which can be controlled and modified by us.
Dogs do their duty and this they remain proud of. Sometimes you may have seen that you are walking on foot to somewhere and a dog too is walking gracefully behind you showing that he is walking behind his owner, though you don’t recognize the dog.
Ans. Specific enzymes are needed for degradation of substances. A single enzyme cannot degrade many substances. Different types of microorganisms…
A population is a group of individuals (all members of a single species) who live together in the same habitat and are likely to interbreed. Each population has a unique physical distribution in time and space. It may contain individuals of different ages, and its size (density) is likely to change over time. It grows or shrinks according to the reproductive success of its members.
The scarcity of oxygen and the need of producing more and more oxygen! We may think for sometime about it. But, anyone knows that life is not possible without it.
Mahaua or the Madhuca longifolia is indigenous to India. It is a good sized tree and it grows up to 20 meters in height.
The balloon vine is an interesting plant of India which is also called as Love in a Puff, the heart pea, the heart seed etc. Botanically, it is called as Cardiospermum halicacabum .This plant belongs to the taxonomic family Sapindaceae or the Soapberry family.
The processes of development through years have spurred on unplanned urbanization, extensive industrialization followed by different types of pollutions, construction of a series of mega dams, and large-scale application of Agro-chemicals. In the process, different parts of the world have started facing ecological crises.
Such bio-chemical and physiological management of body through which body activities remain in control while keeping up adjustments with different body organs
Sometimes it so happens that serious and abrupt changes in weather condition ruin the entire crop. Thus, the hard work of the whole season goes in vain. What about the debt which he has to pay? On the other hand, market prices of his agriculture production often remain too less to support the economy of the farmer. These are the conditions under which a number of farmers in different states of India have been reported committed suicides.
Ocean is a vast natural resource of water. These have also been examined in the search for alternate sources of energy-generation. For example, gravitational pull, by sun and moon causes tides, in which sea level rises and falls, two times in 24 hours. When it rises, sea water may be diverted through suitable channels, to inshore reservoirs driving the turbines, during its entry.
The environment has two basic components: Biotic and Abiotic. The biotic components of an ecosystem are living beings—plants, animals, and…
