Madagascar has suffered severe environmental degradation but still retains some of the most biodiversity on the planet.
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some of the environmental issues in madagascar:
</span><span>Madagascar is among the world's poorest countries. As such, people's day-to-day survival is dependent upon natural resource use. Most Malagasy never have an option to become doctors, sports stars, factory workers, or secretaries; they must live off the land that surrounds them, making use of whatever resources they can find. Their poverty costs the country and the world through the loss of the island's endemic biodiversity. </span>
I think the answer is B,A,E
Answer:
The difference is about the primary production and the oxygen concentration and so the pH of the water. ... In the aphotic zone, there is no light, so vegetal organism can't grow and realize the photosynthesis, the CO2 is accumulated, there is less Oxygen and the pH is lower than in the photic zone.
Explanation:
its on google
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
e. A random assortment of genotypes because of genetic drift
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.