Question
What does the warmth in the oceans limit?
Read the following passage carefully and choose the most appropriate answer to the question out of the four alternatives. Ā Global temperature rises could cause the marine food web to collapse, devastating the livelihoods of tens of millions of people who rely on fisheries for food and income, scientists have warned. Warming oceans restrict vital energy flows between different species in the marine ecosystem, reducing the amount of food available for bigger animals - mostly fish - at the top of the marine food web, according to a study in the journalĀ PLOS Biology.Ā This could have āserious implicationsā for fish stocks, said Ivan Nagelkerken, a professor at University of Adelaide. The Adelaide scientists set up 12 large tanks, each holding 1,800 litres of water, in a temperature-controlled room to replicate complex marine food webs, and tested the effects of ocean acidification and warming over six months. Plant productivity increased under warmer temperatures but this was mainly due to an expansion of bacteria which fish do not eat, Prof. Nagelkerken said.Solution
The correct answer is C
A wire is bent to form a square whose sides are of 88 cm. If the same wire is bent to form a circle, then find the area (in cm2) of the circl...
Two paths of width 5 metres are to be made in the centre of rectangular field such that they are perpendicular to each other. Find the area (in m2<...
A rectangular swimming pool is 25 meters long, 10 meters wide, and 2 meters deep. Find the cost of tiling the walls and floor at ā¹200 per square meter.
Calculate the diagonal of a cuboid whose dimensions are given as 18 meters in length, 12 meters in width, and 6ā3 meters in height.
AB is a diameter of a circle with centre O. A tangent is drawn at point A. C is a point on the circle such that BC produced meets the tangent at P. If ļæ½...
There is a carpet of length 20 m. How many small pieces of carpet, each of length 4 m, can be cut out of it?
The volume of a cube is 64 cm³. If the cost of painting the cube is Rs. 15 per cm², then find the cost of painting five faces of the cube.
A Solid Cone of height 18cm diameter of its base 36cm is cut from a wooden Solid sphere of radius 18cm. the percentage of wood wasted is ?
- If the edge of the cube is increased by 30%, then find the percentage increase in the volume of the cube.