The answer is C. El Niño would cause changes in the genetic makeup of organisms.
Explanation:
there are some essential conditions which must be present in the population for calculating Hardy - Weinberg equation . they are --
- indeterminate breeding must occur in the population
- there must not occur any type of mutation
- natural selection must not occur
- no Gene flow should happen
The major causes of biodiversity decline are land use changes, pollution, changes in atmospheric CO2<span> concentrations, changes in the nitrogen cycle and acid rain, climate alterations, and the introduction of exotic species, all coincident to human population growth. For rainforests, the primary factor is land conversion. Climate will probably change least in tropical regions, and nitrogen problems are not as important because growth in rainforests is usually limited more by low phosphorus levels than by nitrogen insufficiency. The introduction of exotic species is also less of a problem than in temperate areas because there is so much diversity in tropical forests that newcomers have difficulty becoming established (Sala, </span>et al.<span>, 2000).</span>
The answer is c). geographical isolation<span>
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The main function of xylem tissue in the plant transport system is to transport water.
Answer: C) or the third option.