Soil contamination. The others don't really make sense in context
The organisms that are most closely related (based on the tree above described) are dinosaurs and crocodiles . Thus, option "4" is correct.
<h3>What are Evolution and phylogenetic trees?</h3>
Evolution refers to the natural process of descendence with modification, which is mainly due to natural selection.
Evolution leads to speciation, thereby species are related and they show evolutionary relationships.
A phylogenetic tree is a diagram that represents evolutionary relationships between species that share a common ancestor.
In conclusion, the organisms that are most closely related (based on the tree above described) are dinosaurs and crocodiles.
Thus, option "4" is correct.
Learn more about phylogenetic trees here:
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The Douglas fir adapted to enable its survival in the taiga biome due to waxy needles.
<h3>What is Douglas fir?</h3>
Douglas fir may be defined as any type of a genus of tall evergreen timber trees of the pine family having stout bark, pitchy timber, and drooping cones with expanding branching.
Douglas-fir has elongate, narrow, and waxy needle-shaped leaves. The presence of waxy leaves precludes the thrashing of water through the process of transpiration and also controls freezing and leaves drying out.
The complete question is as follows:
How has the Douglas-fir adapted to enable its survival in the taiga biome?
- low growing
- perennial
- waxy needles
- survive on limited nutrients
Therefore, the correct option is C, i.e. waxy needles.
To learn more about the Taiga biome, refer to the link:
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weather is above the surface of the earth instead if underneath, like earthquakes
