– Explanation: The passage says corvids have a "higher percentage of neurons in their forebrain than many primates," but it does not compare total neuron count to a chimpanzee specifically.
– Explanation: The passage states that tactical deception is a "hallmark of advanced intelligence" but does not claim corvids are the only non-humans to do this.
This is not instinct. In a famous experiment dubbed the "Metatool" test, crows had to use a short stick to retrieve a longer stick, which could then be used to retrieve food. This multi-step problem solving, known as , requires planning and an understanding of future needs, a trait once considered uniquely human. Episodic Memory and Planning for the Future For a long time, episodic memory—the ability to recall specific past events (what, where, and when)—was thought to belong only to humans. Western scrub-jays have disproven this. In landmark studies, these birds cached (stored) different types of food. They learned that one type of food (wax moths) decayed quickly, while another (peanuts) lasted longer. When allowed to recover their caches, the jays did not search randomly. They specifically went to the sites where peanuts were stored after a long delay, and to the wax moth sites immediately after caching. This shows they remembered what they hid, where they hid it, and when they hid it. the intelligence of corvids ielts reading answers
if the statement agrees with the information FALSE if the statement contradicts the information NOT GIVEN if there is no information on this
– Explanation: The passage specifically mentions the New Caledonian crow performing this feat. It does not claim all corvids can do this. – Explanation: The passage says corvids have a
– Explanation: The scrub-jays remembered what, where, and when. They checked different caches based on how long the food had been stored and its decay rate.
– Explanation: The Metatool test required using a short stick to get a long stick to get food, which is sequential or multi-step problem solving. In a famous experiment dubbed the "Metatool" test,
– Explanation: The passage explicitly describes a crow pretending to hide food in one spot while keeping it in its throat.