Scientists studying scrub jays found that helpers often assist mated pairs of birds in raising their young. The helpers lack territories and mates of their own. Instead, they help the territory owners gather food for their offspring. Propose a hypothesis to explain what advantage there might be for the helpers to engage in this behavior instead of seeking their own territories and mates. How would you test your hypothesis? If it is correct, what results would you expect your tests to yield?
section 11 part 4 Ds 412 Length —> Inﬁnite – number of cars waiting on a toll booth —> Limited – Maximum number that could wait in the line – space limitation or system capacity Line —> Single line– Only one queue for customers to form – Teller line in a bank —> Multiple lines – Multiple queues to wait for service – Bridge tolls, supermarket Selection —> First come ﬁrst serve —> Reservation ﬁrst —> Emergency —> Shorts processing time —> Others Structure- > Single channel -> single phrase structure -> single channel -> Multi-phrase Structure -> Multi-channel ->single phrase structure-> multi channel -> multi-phrase Structure-> mixed Service rate-> Constant – Same service time for every request - A