Nucleic acids are composed of nucleotides. These nucleotides are in themselves made by nucleosides (purines and pyrimidines) bound to one, two, or three phosphate groups. Thus, the answer is D.
Answer:
the cell wall surrounds the plasma membrane of the cells and provides strength and protection against mechanical and osmotic stress.
Pfft- I don’t know honestly, might want to check that out
Answer:
Carrying capacity- maximum population size of a species that can be sustained in a specific environment
Emigration- departure from one's own natural home or region
Limiting factor-anything that can slow or stop the growth of a population
Population dynamics- how populations of species change over time
Answer: b. photochemical smog
Explanation:
Photochemical smog is the most common type of smog. It is produced when the ultraviolet rays in sunlight reacts with the nitrogen oxides present in the atmosphere.
It can be seen as visible brown haze. It can be seen in morning and in afternoon. It can be seen in cities which are densly populated.
The largest contributor to the formation of photochemical smog are automobile emission, and coal power plants.
