![subject](/tpl/images/cats/biologiya.png)
Biology, 18.01.2020 01:31 crystalclear99
Water in an old building, tested recently, showed high copper and iron content, and low ph levels. a water reading taken 20 years before showed low ph levels, but only minimal traces of copper and iron. if none of the new buildings on the same street showed signs of metallic contaminants, but all reported lower than normal ph readings, how might these readings be explained?
![ansver](/tpl/images/cats/User.png)
Answers: 3
Another question on Biology
![question](/tpl/images/cats/biologiya.png)
Biology, 21.06.2019 15:00
Which pattern most likely came from a gunshot and which one was produced from a blow on the head? explain your answer?
Answers: 1
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 09:00
To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a
Answers: 1
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 09:30
What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent
Answers: 2
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 16:30
Why do mountaineers become breathless as they reach high altitudes
Answers: 1
You know the right answer?
Water in an old building, tested recently, showed high copper and iron content, and low ph levels. a...
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 22.12.2019 04:31
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.12.2019 04:31
![question](/tpl/images/cats/mat.png)
Mathematics, 22.12.2019 04:31
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.12.2019 04:31
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.12.2019 04:31
![question](/tpl/images/cats/mat.png)
Mathematics, 22.12.2019 04:31
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 22.12.2019 04:31
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
English, 22.12.2019 04:31
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.12.2019 04:31
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.12.2019 04:31
![question](/tpl/images/cats/mat.png)
Mathematics, 22.12.2019 04:31
![question](/tpl/images/cats/geografiya.png)
Geography, 22.12.2019 04:31