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BIO 220 EXAM QUESTIONS WITH COMPLETE ANSWERS

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BIO 220 EXAM QUESTIONS WITH COMPLETE ANSWERS

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When were the two great outbursts of the Ebola virus?
In the second outburst, where were the most infections (three)


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!972 and 2014-2016


Guinea
Sierra Leone
Liberia




Bluegill Sunfish (the three types of males)


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Has three males types:
Parental male: territorial and provides all nutrients and care for offspring
Satellite: looks like females and disguises like them to share some eggs

, from females
Sneakers: very small and sneak their sperm into nests




What is the trade off hypothesis in pathogen adaptation?


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cost of pathogen replication increases level of virulence which causes the
host to die


benefit of pathogen replication is that it is required for transmission to new
hosts

replication rate then evolved to maximizes transmission and spread to new
hosts and natural selection for pathogens acts on this




What influences how much should offspring try to acquire from parents?


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a specific gene that influences demand for resources




what are the two types of malaria?


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one in the asexual stages and one in gametocytes

,What is the best case scenario of the provisioning rate wanted in a parent offspring
conflict?


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Maximum benefit - cost (natural selection will look for this)
B(p) - 1/2C(p) for offspring
1/2B(p) - 1/2C(p)




Virulence


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the severity of the disease is assessed by reduction (consequences) in the
host fitness due to that disease

often looked as the additional mortality rate that a pathogen imposes on an
infected host




Altruism shown in long-tailed tits


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When nests are destroyed they leave and go help other adults to make
their nests but they don't help if there are no relatives around. Prefer to
help kin nests




What influences how much a parent should provide for their offspring?

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a specific gene that influence the supplying of resources




Kin Selection


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the process by which evolution selects for individuals who cooperate with
their relatives




Female choice and acoustic cues: complex calls in the Tungara frog


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females prefer more complex calls with more chunks but this has a cost
because bats also prefer these calls so this decreases survival




Sexual Selection


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A form of natural selection in which individuals with certain inherited
characteristics are more likely than other individuals to obtain mates.

Adds on to natural selection of survival and reproduction

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