Compared to the control (red line), in which both sea urchins and limpets are present, removing limpets alone (blue line) did not have much effect. this might suggest that limpets have little effect on seaweed distribution. however, seaweed cover increased much more when both urchins and limpets were removed (purple line) than when only urchins were removed (green line). how might you explain this result? how might you explain this result? when only urchins were removed, limpets increased in abundance and reduced seaweed cover. both limpets and urchins eat seaweed, so removing either species has the same effect on seaweed cover. both limpets and urchins eat seaweed, so both species have to be removed in order for seaweed cover to increase. if only limpets are removed, more time is needed for seaweed cover to increase.

the scientific method.

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.

c is the answer. hope this