Answer:
The fossils in the lower layers are older than the fossils in the upper layers.
Explanation:
One strand of DNA contains many proteins.
Answer: When studying a rock sample, geologists observe the rock's mineral composition, color, and texture.
Explanation:
Answer:
The Nitrogen Returns into the Soil (Nitrogen Cycle)
Explanation:
After a plant dies it's the job of a decomposer to carry along the nitrogen back to the surface so that it may continue to cycle along, until it eventually returns back to the decomposer through the death of another plant. This part of the cycle is small compared to the whole Nitrogen cycle.
Down syndrome causes a distinct facial appearance, intellectual disability, developmental delays, and may be associated with thyroid or heart disease.
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