Question 11/11 OV
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Xa
11 Cane toads are large, poisonous frogs native to Central and South America. They were introduced to Australia in 1935 in an attempt to control the beetle population
in the sugarcane fields. Since then, their speed has increased significantly. According to recent studies, scientists have determined that they now have longer legs,
are more active, and are larger in size than their ancestors in Central and South America. Which statement best explains why the cane toads in Australia move more
quickly than their ancestors?
The cane toads in Australia were likely introduced to a new food source allowing them to grow longer legs and larger in size and speed. These traits were
then passed onto offspring.
B
The cane toads both in Australia and in Central and South America are born with similar traits, but the cane toads in Central and South America keep their
original traits, and cane toads in Australia have more space to roam, so they grow longer legs and larger in size.
Over time, cane toads in Australia had more space to roam and less predators, so they stretched their legs to increase leg length, size, and speed and
passed these traits on to their offspring.
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Over time, cane toads in Australia that were born with longer legs, were more active, and were larger in size were more likely to survive and pass these
traits on to their offspring.