Question 23
1. Hedgehog
2. Marmot
3. Pangolin
To reduce the chance of being captured by predators, which of the above organisms rolls up/roll up and protects/ protect its/their vulnerable parts?
AOptions
BSolution
This question asks which of the given animals roll up or protect their vulnerable parts by rolling up when threatened by predators.
1. Hedgehog: Hedgehogs are known for their defense mechanism of rolling into a tight, spiny ball when threatened. They expose their sharp quills to predators, making them difficult to attack. While they do roll up, their primary deterrent is their spines. However, the unique and most complete 'rolling up' for protection is exhibited by pangolins among these options.
2. Marmot: Marmots are large ground squirrels. Their primary defense mechanisms include alarm calls, fleeing to their burrows, or sometimes aggressive displays. They do not roll up into a ball for protection.
3. Pangolin: Pangolins are unique mammals covered in large, keratinous scales. When threatened, their characteristic defense is to curl up into a tight, almost impenetrable ball, completely enclosing their soft underbelly, head, and limbs within their hard, overlapping scales. This makes them extremely difficult for predators to attack. This is their definitive anti-predator strategy.
Given the options and common knowledge, while hedgehogs also roll, pangolins are the quintessential example of animals that roll into a compact, armored ball to fully protect their vulnerable parts. Therefore, '3 only' is the most accurate answer focusing on the most complete and primary use of this defense strategy.
CStrategy
For questions on animal behavior and adaptations, identify the most characteristic and unique defense mechanisms. While multiple animals might share a similar behavior, look for the one where it is the most defining or effective primary defense strategy, especially when options are mutually exclusive (like 'only' choices).
DSyllabus Analysis
This question falls under Environment and Ecology, specifically focusing on animal adaptations, biodiversity, and behavioral ecology.
EQuestion Analysis
Medium to Difficult. While hedgehogs also roll, the question likely seeks the most definitive example where rolling into an 'armored' ball is the primary and highly specialized defense mechanism, which is characteristic of the pangolin.