In the 1800s, the irish wolved the problem of feeding a growing population by planting specifically, they a r e
lumper potato variety generally, potatoes are propagated by cutting toes into pieces, anche
day that
sprouts into a new plant. unfortunately, this crop was devastated by potato blight and because and was dependent on the
potato, one in eight irish people died of starvation in three years during the irish potato famine of the 18405
the basis for the devastation of the potato crop was
a
sexual reproduction and genetic sameness
1)
not for using on just one species of potato
choosing a staple crop that was susceptible to light
d)
planting a crop that did not tolerate the maritime climate

Hunting in the darksome fish rely on senses beyond sight. in the darkness of the marianas trench, a fish called the rattail has an extremely sensitive sense of smell. the fish uses scent, rather than sight, to steer toward food. once it's near food, the rattail uses a special organ on the bottom of its chin to guide itself by feel.marine snowone staple of the deep sea diet is "marine snow," flakes of organic, edible substances that sink down from the upper ocean. animals at the ocean's bottom find sustenance in everything from the bodies of dead creatures to fecal matter. marine snow is diverse enough to support numerous species. for instance, several species of snails and worms feed exclusively on deceased whales.microorganismsthe deep sea is an intricate ecosystem, and even the ocean floor itself plays a part. hydrothermal vents are cracks in the sea floor where erupting magma mixes with ocean water to produce plumes of hot, sulfur-rich chemicals. some microbes can use these chemicals for energy, sustaining their existence and that of the animals who depend on their roles in the deep sea food chain.