Biology, 02.11.2019 06:31 jerseygirl6167
Acid drainage does not normally occur in areas before mines are built but tends to happen after the mine has been in operation for many years. what causes acid drainage?
a. concentrated acids used to dissolve metals from the rock are picked up in rainwater.
b. mining exposes unweathered rock surfaces that react with water and the atmosphere to generate acids.
c. the acid is already present in trapped underground pockets and is released by mining equipment.
d. abandoned mining equipment leaks acids from batteries.
Answers: 3
Biology, 22.06.2019 01:30, vetterk1400
Plz ! cattle ranchers and dairy farmers rarely allow all of their animals to reproduce instead they practice selective breeding and only encourage the reproduction of animals with specific features. which of the following cows would a dairy farm most likely choose to reproduce? a. a cow that makes a lot of milk. b. a cow that can run quickly. c. a cow with a think, soft fur. d. a cow with large, strong hooves.
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What enzyme is most important for dna replication and why?
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Biology, 22.06.2019 12:00, yesseniaroman21
Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.
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