A. Regularly test the water in residents' homes
Explanation:
The best way to have kept the water quality in check would have been to constantly and regularly test the water in residents' homes.
Lead is used in making pipes due to its very unique properties and availability. Over time, lead can enter the water it is carrying in dissolved form.
Increasing amount of lead in the water will eventually become toxic when an anomalous concentration is reached.
The best way to monitor the trend is to simply check the water in residential homes from time to time for dissolved lead.
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Answer:
American badger (Taxidea taxus) and Alfalfa (Medicago sativa)
Explanation:
American badger (Taxidea taxus) and Alfalfa (Medicago sativa) have 32 number of chromosomes in the somatic cells while on the other hand, there are 18 number of chromosomes in the sex cells of both American badger and Alfalfa due to haploid number of chromosomes. When the cell of American badger and Alfalfa undergoes mitosis, the parent cell divides and produces two daughter cells having diploid number of chromosomes.
What do you mean by bone?
It form the contraction and relaxation of muscle
Answer:
B. the appearance of lichens and mosses in an area where a glacier has recently melted away
Explanation:
Ecological succession, which refers to the series of changes that occurs over time in an ecosystem, can be of two types namely: primary succession and secondary succession.
Primary succession is a succession that involves an area where no form of life has grown previously, hence, the area of land is barren e.g bare rock. Primary succession is first colonized by species called PIONEER SPECIES e.g. lichens, mosses etc.
According to this question, "the appearance of lichens and mosses (pioneer species) in an area where a glacier has recently melted away" is an example of PRIMARY SUCCESSION.
