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Vera_Pavlovna [14]
3 years ago
6

Stable ecosystems can be altered, either rapidly or slowly, through which of the following events?

Biology
1 answer:
ehidna [41]3 years ago
4 0
Stable ecosystems can be altered, either rapidly or slowly, through human activities, natural disasters, climatic changes. An ecosystem may be described as a community and its surrounding which includes non living organisms. Human activities such as deforestation, mining, dumping of wastes on the oceans alters and affects the ecosystem  negatively and thus making the habitats unfavorable for the organisms. Natural disasters such as floods, tsunami  and climatic changes may also alter the ecosystem.
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3 years ago
In flies, red eyes (R) are dominant to brown eyes (r). A heterozygous fly is crossed with a homozygous recessive fly
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Answer:

The cross of a heterozygous fly with a homozygous fly can be shown as follows:

         r            r

R      Rr           Rr

r        rr            rr

The results show that there is a 50% probability that the flies produced will have red eyes. Their genotypes will be heterozygous.

The results of the punnet square show that there will be a 50% probability that the offsprings will have brown eyes. Their genotype will be homozygous recessive.

A homozygous trait can be described as a trait which has same alleles for the gene which encodes the trait. Heterozygous means that both the alleles for the trait will be different.

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Answer:

phototropism

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phototropism is the plant responding to external stimuli, in this case the sun.

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