| Comprehension: | ||
| Read the given passage and answer the questions that follow. The idea that certain influential species, which ecologists call keystone species, can significantly alter the ecosystems around them first appeared in scientific literature in 1974. Bison, sea otters, beavers, elephants and wolves all exert this power. One way in which wolves wield influence is by preying on coyotes, which produces ripple effects across the system. Fewer coyotes means more rodents, which in turn means better hunting success for birds of prey. Wolves also cause nervous behaviours among their prey. Some scientists believe that newly returned predators create a ”landscape of fear” among prey species – a term that isn’t positive or negative, just descriptive. This idea has shifted thinking about predators. For example, elk avoid some areas when wolves are around, resulting in ecological changes that cascade down from the top. Vegetation can recover, which in turn may benefit other species. Word count: 140 Animal behavioral science research has provided pointers for better wolf management. Studies show that wolf packs are less likely to prey on livestock if their social structure remains intact. This means that ranchers and wildlife managers should take care not to remove the pack’s breeding pair when problems occur. Doing so can fragment the pack and send dispersing wolves into new territories. | ||
| SubQuestion No : 23 | ||
| Q.23 | How do wolves create nervous behaviours in their preys? | |
| Ans | 1. By causing fear | |
| 2. By isolating the prey | ||
| 3. By hiding behind bushes | ||
| 4. By attacking in packs | ||
Correct Ans Provided: 1
