<span>In ecology, PPDF stands for Ponderosa Pine Douglas Fir.
In general, PPDF is used as a security of a document which exceeds what someone can do within the PDF software were itself. In ecology its PPDF genus is Pseudotsuga.
Other names which are marketed include
Douglas fir, Oregon, and Oregon pine.</span>
Answer:
False
Explanation:
All mammals are vertabrates, because they are in the phylum chordata, meaning that all of the animals there have vertebrae. In fact, all mammals have exactly 7 neck vertebrae, no matter how long their neck is.
The correct option is FIXATION.
Nitrogen fixation is the process by which atmospheric nitrogen are incorporated into organic compounds. Nitrogen fixation is typically carried out by specific micro organisms. Nitrogen fixation plays a very crucial role in the earth's ecosystem.
