1. It can be hard to count undiluted populations as there are so many, by diluting, the count can be done simpler and verified by the average of different counts.
2. Bacteria colonies are likely to cover the entire plate if the number is high, therefore making it virtually impossible to count them.
Answer:
Option (A)
Explanation:
Biogeography is usually defined as a branch of biology that deals with the study of the dispersion of flora and fauna throughout a geographical area. It also helps in understanding the factors that are responsible for this dispersion of species. These factors include temperature, precipitation, forest cover, and many others.
This study of biogeography also helps in the interaction between the living species and the environment and how they are dependent on each other. They are concerned more about the biosphere. These biogeographical boundaries are observed to be affected and changing over decades which could be due to several factors.
Thus, the correct answer is option (A).
With the help of xylem which is present in plants
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