Inter specific competition (when species compete for a resource in short supply) may lead to resource partitioning (differentiation of ecological niches) so that more species can live in one area, then if all of those species didn't have different ecological niches.
The correct answer is D.crust, mantle, outer core, inner core
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B
The other choices are nitrogen sources for plants.
Explanation:
Plants absorb nitrates (NO₃) and nitrites (NO₂) from the soil. Plants utilize these nitrogen sources which they assimilate to make plant proteins, amino acids and nucleic acids. Animals get their nitrogen sources from proteins that they acquire from feeding on the plants. These proteins are broken down into amino acids and used to make animal proteins. The amino acids also provide nitrogen source for which nucleic acids are formed.
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Central venous access device refers to a small, flexible tube positioned in large veins for an individual who needs continuous access to the bloodstream. Such devices are usually considered as catheters or venous access ports, as they permit regular access to the veins without application of deep needle sticks.
All the CVADs require a dressing immediately post insertion of the device to reduce the threat of infection. It requires a dressing surrounding the entrance to the tunnel of the skin unless and until the wound gets healed. This can take about 10 to 14 days based on the condition of the patient.
