Researchers in alaska were interested in increasing the sockeye salmon (oncorhynchus nerka) population in three coastal lakes. to accomplish this, the ponds were treated with fertilizers. as a result, zooplankton biomass increased between 40% and 700% in the three lakes. the substantial growth in zooplankton would suggest that prior to these experiments, these lakes were

going under eutrophication process.

Explanation:

Body waters like lakes normally produces or receives some organic wastes, from the same living things of the environment or by pollution. In this example  the fertilizers that were dropped into the lake, they have a lot of nitrogen, carbon or phosphorous compounds, that by the passing of the time will be consumed by the living things and elevate the production of zooplankton. with the increase of zooplankton, the population of fish is expected to increase also.

since there isn't any suggested answers i will give you the reason and hopefully you can figure it

south africa, or rather all of africa, has not been in the location in which it is nowadays throughout the geological past. after the super-continent pangaea started to break apart, gondwanaland, in which was africa, moved further south, and parts of it came to be very close to the south pole. because the climate in this part of the world is very cold due to the very dispersed sun rays in there, what is now south africa, started to freeze, and the conditions were right for the formation of glaciers. the glaciers existed up until the period when gondwanaland started to break apart and what is now africa started to move towards north, sp it warmed up and the glaciers melted.

yes probably it reduce

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