Answer:
population level
Explanation:
it ocurrs at the population level as scientists requires genetic variation between individuals of a population for natural selection
Answer:
The correct answer is option d. "All of the above".
Explanation:
A species is defined as a group of similar living organisms, constituting the basic unit of taxonomic rank of an organism. In Biology an hybrid is considered a species. It doesn't matter if the hybrid comes from combining the qualities of two organisms of different breeds, varieties or species Infertile hybrids such as mules and ligers are considered species as well.
Answer:
C. A hillside that has been cleared by a volcanic eruption.
Explanation:
Pioneer species are hardy species which are the first to colonize barren environments or previously biodiverse steady-state ecosystems that have been disrupted, such as by fire or other natural disasters. Some lichens grow on rocks without soil, so may be among the first of life forms, and break down the rocks into soil for plants.
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