To get a carpet like grass lawns are mowed regularly. Is there any scientific explanation for this?

In botanical gardens and tea gardens, gardens trim the plants regularly so that they remian bushy. Does this practice have any scientific explanation?

Assertion: Chemical fertilizers and pesticides are not only expensive but also pose environmental hazards Reason: Any mismanagement during application of chemical fertilizers and pesticides is likely to cause damage only to crops but also to man. If both Assertion and Reason are true and Reason is a correct explanation of Assertions. If both Assertion and Reason are true but Reason is not a correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false.

Two questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you required to choose any one of the following four responses. If both Assertion and Reason are true and Reason is a correct explanation of Association. If both Association and Reason are true and Reasons is not a correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertions and Reasons are false. Assertion:Antibodies have proved effective in lowering mortality rate. Reason:Antibodies are used as preservation of food like fresh meat, fish and poulty feed.

These questions consist of two statements each, printed as Assertion and Reason. While answerng this questions are required to choose any one of the following four responses: If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Fish meal is rich source of proteins for cattle and poultry. Fish meal is produced from non-edible parts of fish like fins, gills, etc.

These questions consist of two statements each, printed as Assertion and Reason. While answerng this questions are required to choose any one of the following four responses: If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Fish meal is a rich source of proteins for cattle and poultry. Fish meal is produced from non-edible parts of fishes like fins and tail.

These questions consist of two statements each, printed as Assertion and Reason. While answering these questions,you are requied to choose any one of the following four responses If both Assertion and Reason are true and Reason is a correct explanation of the assertion If both Assertion and REason are true but Reason is not a correct explanation of the Assertion If Assertion is true but Reason is false If both Assertion and Reason is false. Assertion:Rate of extinction of wildlife has become rapid in the last one hundred years Reason: Unplanned human activities like population explosion, deforestation, industriliazation, hunting etc have destroyed the natural habitats of many spp. of wildlife.

The shells of crabs found around a particular coastal location in Japan seem mostly to resemble the legendary face of a Samurai. Given below are two explanations of this observed fact. Which of these strikes you as a scientific explanation? - (a) A tragic sea accident several centuries ago drowned a young Samurai. As a tribute to his bravery, nature through its inscrutable ways immortalised his face by imprinting it on the crab shells in that area. (b)After the sea tragedy, fishermen in that area, in a gesture of honour to their dead hero, let free any crab shell caught by them which accidentally had a shape resembling the face of a Samurai. Consequently, the particular shape of the crab shell survived longer and therefore in course of time the shape was genetically propagated. This is an example of evolution by artificial selection.

These questions consist of two statement each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is a correct explanation of the Assertion. B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion: Serum cannot clot the blood. Reason. Serum is obtained form blood plasma minus blood-clotting proteins like prothrombin and fibrinogen.

These questions consist of two statement each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is a correct explanation of the Assertion. B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion: Inhabitants close to busy airports are likely to experience health hazards. Reason. Sound levels of jet aeroplanes usually exceed 160 dB.

These questions consist of two statement each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is a correct explanation of the Assertion. B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion: Cardoac muscle contract rapdily like striated muscles but do not undergo fatigue. Reason. Cardiac muscles contract rhythmically