Biology

Biology, 18.10.2019 16:50, hellothere2458

If someone add thousands of small fish to a lake, how would the number of big fish change

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Biology, 16.07.2019 21:30, mariehayes099

Examine the following scenario: a population of small fish lives in a lake (lake a).the dark-colored fish are the ancestral phenotype and represent the usual coloration of the species. the bright-colored fish, however, arose over time. there is a steady rise in the population of bright-colored fish. both populations thrive. suppose that a short land barrier separates lake a from another small lake with a population of only the normal dark-colored fish (lake b). after torrential rains lasting for days, the lakes overflow and a few of the bright-colored fish from lake a are washed into lake b. list the sequence of evolutionary mechanisms which have come into effect in each event.

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Biology, 19.07.2019 07:30, pito63

Examine the following scenario: a population of small fish lives in a lake (lake a).the dark-colored fish are the ancestral phenotype and represent the usual coloration of the species. the bright-colored fish, however, arose over time. there is a steady rise in the population of bright-colored fish. both populations thrive. suppose that a short land barrier separates lake a from another small lake with a population of only the normal dark-colored fish (lake b). after torrential rains lasting for days, the lakes overflow and a few of the bright-colored fish from lake a are washed into lake b. list the sequence of evolutionary mechanisms which have come into effect in each event.

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Mathematics, 07.09.2019 20:20, yuvallevy14

2. a biologist studies a population of fish in a lake, and observes that the number n(t) (measured in thousands of fish in the lake at time t years is governed by the differential equation dn/dt = n - 1/2n^2 currently there are 800 fish in the lake (that is, n(0) = 0.8). (a) give a brief physical interpretation of each term on the right hand side of the differential equation. (b) suppose now that fish are harvested from the lake at a constant rate of h thousand fish per year. construct a differential equation incorporating this new information into the above model, and determine the value of h that keeps the fish population constant at 800 fish. (c) it is decided that fish will be harvested from the lake at a constant rate of 500 fish per year. solve your differential equation from the previous part with h = 0.5. (d) is the harvesting rate of 500 fish per year sustainable? justify your answer. (e) after 6 years of harvesting fish at a rate of 500 fish per year, there is a complete ban placed on fishing in the lake. how long will it take for the population to return to 800 fish?

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Biology, 08.10.2019 18:50, brianna4455

Apopulation of small fish lives in a lake (lake a.the dark-colored fish are the ancestral phenotype and represent the usual coloration of the species. the bright-colored fish, however, arose over time.there is a steady rise in the population of bright-colored fish. both populations thrive.suppose that a short land barrier separates lake a from another small lake with a population of only the normal dark-colored fish (lake b. after torrential rains lasting for days, the lakes overflow and a few of the bright-colored fish from lake a are washed into lake b.list the sequence of evolutionary mechanisms which have come into effect in each event.

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If someone add thousands of small fish to a lake, how would the number of big fish change...

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