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antoniya [11.8K]
3 years ago
15

Which organelles do scientists believe originated by symbiotic relationships between primitive eukaryotes and certain prokaryote

s?
Biology
1 answer:
AnnyKZ [126]3 years ago
7 0
The organelles  that scientists  believed  that  it originated  by  symbiotic  relationships  between   primitive  eukaryotes  and  certain  prokaryotes   is  known as chloroplast. Chloroplast  contain   chlorophyll  which  capture  energy  from sunlight  that  is  used   in  photosynthesis .This  energy  is  converted  to  ATP  and NADPH
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Populations of the grasshopper Vandiemenella viatica possess different chromosomal fusions and inversions. Grasshoppers that are
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Answer:

The options

a. New combinations of genes yielding genotypes of greater fitness

b. Few heterozygotes because of underdominance

c. Frequency-dependent selection, leading to fluctuations in fitness

d. Heterozygotes with greater fitness, owing to overdominance

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The CORRECT ANSWER IS b.

b. Few heterozygotes because of under dominance

Explanation:

In genetics, underdominance (at times called "negative overdominance") is the opposite of overdominance.

It is the selection against the heterozygote, that leads to disruptive selection and divergent genotypes. It occurs in cases of inferior and reduced fitness (As in our case study, it is the different chromosomal fusions and inversions)

of the heterozygotic genotype to the dominant or recessive homozygotic genotype. It is unstable as it causes fixation of either allele.

Another example is the African butterfly species Pseudacraea eurytus, which makes use of Batesian mimicry to avoid predation. This species carries two alleles that gives a coloration that is alike to a different local butterfly species that is harmful to its predator. The butterflies who are heterozygous for this trait are observed to be intermediate in coloration and thus encounter an higher risk of predation and a decrease in the total fitness.

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your welcome ;)

Explanation:

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