– 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 Metatool test required using a short stick to get a long stick to get food, which is sequential or multi-step problem solving. the intelligence of corvids ielts reading answers
Recent neuroanatomical studies reveal that while corvids lack a neocortex, they possess a high density of neurons packed into their pallium (the forebrain region). In fact, some corvids have a higher percentage of neurons in their forebrain than many primates. The result is a brain that, while physically small, performs computational feats that rival those of great apes. One of the clearest indicators of higher intelligence is the ability to not just use a tool, but to modify one. The New Caledonian crow is the poster child for this behavior. In controlled experiments, these crows were presented with a stick too short to reach a piece of food and a piece of wire. Without any training, the crows bent the wire into a hook to retrieve the food. This spontaneous manufacture of a novel tool demonstrates causal reasoning —the ability to understand that modifying an object changes its physical effect on the environment. – Explanation: The passage says corvids have a
5. Ravens will sometimes pretend to hide food to mislead other birds. 6. The brain of a crow contains more neurons than the brain of a chimpanzee. 7. Corvids are the only non-human animals known to engage in tactical deception. Questions 8–10: Summary Completion Complete the summary below using words from the box. In fact, some corvids have a higher percentage
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.