The red node represent a speciation event and the common ancestor of the species B and C i.e option 1 and 4 are the right answers.
Explanation:
Speciation is an event that leads to splitting in a lineage producing two or more species. The speciation would lead to different species as they no longer can interbreed and produce viable offspring.
The node shows that the two species originated from the same root but undergone speciation to be two different species.
The speciation takes place due to genetic drift, selective breeding and mutations in the population which lead to Natural selection.
In the given picture the root with trait one got modified into trait 4 and 5 via trait 3. This means that due to mutation the genes have changed and evolved for better functions and thus they survived via Natural Selection.
The figure represents diverge population as two new species are there and thus is Allopatric Speciation and have common ancestors.
Due to global warming, the climatic conditions such as rise in temperature of the coral habitat in the oceans changes. The corals become stressed by changes in conditions. Under these conditions, corals expel the symbiotic algae living in their tissues. This turns corals completely white. This is called coral bleaching. Due to coral bleaching, it becomes more stressed and this can leads to its death. Algae also may not be able to survive alone.
Observation of the emergency scene is the EMT<span> action that would most likely could provide information important for community health initiatives that are designed to prevent injuries.
</span><span>The observation is very important because it helps to understand the reason for sustained injury: automobile accident, electric shock, fall, fire, etc.</span>
Plant and animal cells both have A nucleous