Teosinte, on the left, is a Mexican wild grass that is considered to be a parent plant of modern corn, on the right. Over time, farmers selected larger seeds from the teosinte to plant in next year's crop, eventually leading to larger kernel size in corn. This is known as artificial selection. Evaluate the examples and select those that do NOT show artificial selection. CHOOSE TWO.
Responses
A White rabbits have a low survival rate in nature, because it is easy for predators to spot them.White rabbits have a low survival rate in nature, because it is easy for predators to spot them.
B Penguins with higher body fat tend to survive nesting in the Antarctic winter, while leaner penguins often die.Penguins with higher body fat tend to survive nesting in the Antarctic winter, while leaner penguins often die.
C A gene for disease resistance in fir trees is transferred to pine trees using modern DNA technology, allowing farmers to maximize pine tree growth.A gene for disease resistance in fir trees is transferred to pine trees using modern DNA technology, allowing farmers to maximize pine tree growth.
D Because big game hunters sought elephants for ivory, often poaching those with the biggest tusks, more African elephants today naturally lack tusks compared to the elephant populations 100 years ago.Because big game hunters sought elephants for ivory, often poaching those with the biggest tusks, more African elephants today naturally lack tusks compared to the elephant populations 100 years ago.
E In subsaharan Africa, genetically modified grass varieties that carry genes for disease and drought resistance are now available to farmers, providing more sustainable food sources for their livestock
The examples that do NOT show artificial selection are:
B Penguins with higher body fat tend to survive nesting in the Antarctic winter, while leaner penguins often die.
C A gene for disease resistance in fir trees is transferred to pine trees using modern DNA technology, allowing farmers to maximize pine tree growth.