Secondary reinforcers are learned or conditioned. An example of a secondary reinforcer is grades or money. Secondary reinforcers are learned and are reinforced by the continual use of the reinforcer. Primary reinforcers are biological and include food, drink, and pleasurable activities.
When two species occupy the same niche, they compete for all the resources they need. The superiority of one species over another forces others to adapt and endanger them. This is called conflict elimination.
No two species can have exactly the same niche. Otherwise, you will be in direct competition for resources. In this case, one species is better than the other. When a lost species fails to adapt, it leads to extinction.
The competitive exclusion principle states that two species cannot occupy exactly the same niche in a habitat. In other words, different species cannot coexist within a community if they compete for the same resource.
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Answer:
their body is mostly fat which helps them keep warm/survive without food, large paws spread out their weight across the ice to help from falling in, fur is white to camouflage them from predators, their coat sheds water to prevent heat loss, small surface area to volume ratio to minimize heat loss
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