Biology
Biology, 14.10.2019 17:30, michaelbernbenn5740

Most large-scale coal mining in the western united states uses which extraction method?

a. surface strip mining
b. deep shaft mining
c. longwall mining
d. drift mining

answer
Answers: 2

Other questions on the subject: Biology

image
Biology, 21.06.2019 18:00, shahedraed82
Iwill give brainiest to first person who gets it ! what are 3 basic types of interactions we see in an ecosystem?
Answers: 1
image
Biology, 21.06.2019 20:00, u8p4
Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. chytridiomycosis is a fungal disease first identified in 1998 as a cause of massive amphibian deaths. in some severely impacted populations, a few individuals have survived, perhaps because of some natural resistance. if these resistant individuals continue to survive and prosper, new resistant populations might emerge. this would be an example of the founder effect artificial selection genetic drift natural selection sexual selection
Answers: 3
image
Biology, 22.06.2019 13:00, Brooke7644
In trying to determine whether dna or protein is the genetic material, hershey and chase made use of which of the following facts? a) dna contains sulfur, whereas protein does not. b) dna contains phosphorus, whereas protein does not. c) dna contains nitrogen, whereas protein does not. d) dna contains purines, whereas protein includes pyrimidines.
Answers: 3
image
Biology, 22.06.2019 19:20, jpyperofficialp2z5xs
16 select the correct answer from each drop-down menu. sharks, whales, and dolphins share similar features such as body shape and the position of fins. hoy while whales and dolphins have lungs. these differences indicate that the organisms share a comme whales also possess a vestigial pelvic bone. the presence of the pelvis bone may indicate that whales reset next
Answers: 2
Do you know the correct answer?
Most large-scale coal mining in the western united states uses which extraction method?

...

Questions in other subjects:

Konu
English, 18.11.2020 18:50
Konu
Mathematics, 18.11.2020 18:50
Konu
English, 18.11.2020 18:50
Konu
Mathematics, 18.11.2020 18:50
Konu
English, 18.11.2020 18:50