The correct answer is option C
The rain forest has millions and billions of plant species that is investigated every year for its medicinal properties. But it has not been possible till yet to test half of the rainforest plant for its medicinal properties. There are many species that has been tested earlier and is now used for its medicinal properties.
Answer:
Isotopes
Explanation:
The carbons are different isotopes.
I am most positive your answer is going to be <span>C. treating lakes and soils with nickel, I hope this helps!! </span>
Answer:
There are about 50 Orange-bellied Parrots remaining in the wild, and a captive breeding population of around 320 individuals. The species is at risk of extinction in the wild in the near-term. Current knowledge suggests that habitat loss and degradation, particularly in the non-breeding range, has caused the decline.
Answer:
Allopatric speciation
Explanation:
Allopatric speciation refers to the geographic separation of a continuous genetic background, originating two or more new geographically isolated groups. These divergences of the original population might be related to migration in different directions, extinction of geographically intermediate populations, or geological events. During these events of speciation, emerging new barriers impede genetic flow between groups, as the two new populations that are separated can not get together and mate anymore. These barriers might be geographical or ecological.
Different stages are involved in the allopatric speciation process:
• The emergence of the barrier.
• Interruption in the genetic flow
• Slow and gradual differentiation due to the occurrence of mutations in each population and their accumulation in time.
• Genetic divergence by natural selection and reproductive isolation, impeding the two groups to mate even if the barrier disappears.
• Prezigotic isolation mechanisms favored by selection a secondary contact between the new species occurs.
The Panama isthmus is an example of allopatric speciation caused by an extrinsic geological barrier that interrupted the genetic flow between species driving to genetic changes and reproductive isolation.
Two different groups that evolved in allopatry might meet again in secondary contact if the barrier that separated them, disappears. In the Panama isthmus example, the groups that did mate, could not produce any fertile progeny because of postzygotic reproductive isolation. And the groups that did not mate, were not attracted to each other because of prezygotic reproductive isolation.
