First the question is asking If a descision was made to drain the wetlands which a wetlands is haves rich soil and nutrients which is good for farming and an agricultural action means someone would clear out a forest of farming reasons so I would say the answer is A
Zygotic selection against dominant alleles is more efficient than selection against recessive alleles. It can take fewer than 100 generations to eliminate a dominate delterious allele with an initial frequency of 0.70.
According to hardy- Weinberg equilibrium scientist have observe at-least two generation. Allele frequencies are the same for both generations then the population is in the Hardy- Weinberg equilibrium. The frequency of heterogeneous individuals are equal to 2pq.
In case of 2pq equals 0.32 which means that the frequency of individuals heterozygous for this gene is equal to the 32%. Hardy- Weinberg equation is , p=the frequency of dominant allele in a population.q= frequency of recessive allele in a population.
To learn more about hardy- Weinberg equilibrium here
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Well some times water creates rivers and canyons like the grand canyon
Answer:
B. pre-zygotic, lock and key
Explanation:
When pollens from the different species fall on the stigma of a flower from some other species, the chemicals released from the stigma do not allow the pollens to germinate. The pollen tube is not formed to carry the male gametes to the egg cell for fertilization. Since this process does not allow the formation of zygote between the male and female gamete of two different species, it is a pre-zygotic isolating mechanism.
Here, the pollens and stigma of different plant species are not compatible with each other and the structural incompatibility of the reproductive structures prevents fertilization. This represents the lock and key mechanism of reproductive isolation.
