One species mates at the season when daylight is increasing from 13 hours to 13 hours, 15 minutes; another species mates at the season when daylight is increasing from 14 hours to 14 hours, 15 minutes. The isolating mechanism is

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#Question id: 3268

#Section 2: Evolution

A population of insects is in Hardy-Weinberg equilibrium for a gene with alleles A = orange and a = yellow eyes. There are 91% orange and 9% yellow individuals in the population. If the fitness of the yellow phenotype suddenly drops to zero, what will be the allele frequency in the next generation?

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#Question id: 16794

#Section 5: Applied Ecology & Evolution

Creutzfeldt-Jakob disease (vCJD) can be contracted only if _______

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#Question id: 3285

#Section 2: Evolution

Natural selection continually operates on each species to keep up with improvements made by competing species; each species’ environment deteriorates as its competitors evolve new adaptations. This is known as

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#Question id: 12412

#Section 1: Ecology

In most mammalian populations the sex ratio

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#Question id: 10578

#Section 1: Ecology

The population of annual breeder growing at a rate of 10% per year. Initial population size is 1200. After 3 years population size would be