Which of the following represents a type of mutualism? (a) A red-tailed hawk pounces on a field mouse for dinner.

(c) Number of ways of selecting 5 guests from nine friends = 9C5 Out of these, 7C3 ways are those in which two of the friends occur together [3 more persons...

(d) Biomagnification is the phenomenon of increasing concentration of compound in the tissue of organism, as the compound passes up a food chain, usually as a result of food intake....

(a) Lion-tailed Macaques are found in the mountain forests scattered across three Indian states stated above. The lion-tailed Macaques are endangered as per IUCN.

(d) We cannot predict the number of dinners for a particular member from the given data. It may be possible that by choosing members from picking lots, one may have...

(d) A nectar-feeding bat swoops in to drink nectar from some flowers

(b) Red soils are very poor in lime, humous and potash.

Perimeter of a rectangle = 2 (length + breadth)  Length of the rectangular field = 3 × breadth  Therefore perimeter of field = 2 (3 × breadth + breadth)  = 2 ( 4...

Breadth = 20 cm Perimeter of the field = 280 cm.

Square field