Which type of mining is likely the least harmful to the environment?a. surface mining
b. placer mining
c. subsurface mining
d. none of the above

Answers

Answer 1
Answer:

Answer;

-Surface mining

Explanation;

-Mining involves the extraction of valuable minerals or other geological materials from the earth, commonly from an orebody, lode, vein, seam, reef or placer deposit. Despite having a large range of advantages economically, mining impacts the environment negatively because minerals are contained within the Earth. Earth must be removed in order to extract the minerals. When the minerals are close to the surface, the earth is removed, causing destruction to the shape of the land and the flora and fauna living in that area.

-Among different types of mining, surface mining is one of the method that greatly impacts the environment. It destroys all plant life in the area the mine occupies. Plants living in the area where the surface mine is to be located are removed. After the surface mine is no longer productive, plants may eventually return to the area, but typically some human efforts at reclamation are required to restore the environment to some level of productivity.

Answer 2
Answer:

Answer:

It's C. subsurface mining

Explanation: hope it helps ^w^


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Which is the longest day of the yearA. summer solstice
B. winter solstice
C. Spring equinox
D. fall equinox
This is science

Answers

A. summer solstice is the correct answer brainliest plz

The longest day of the year would be A. summer solstice

What is the relationship between the distribution of coral polyps and the population density of plankton in the water?

Answers

The small water born plants or animals are known as plankton. They can be either phytoplankton or zooplankton.

The relationship between the the distribution of coral polyps and the population density of plankton is that coral polyp depends on the plankton for their nutrition.

Most of the coral polyps like zoanthids depends on phytoplankton and zooplankton for their food(nutritional needs).

They also depend on the bacterioplankton for their food.

They eat coral and other things from coral, they use coral for habitat

How does the small size of a spore help its function? a) Spores can travel far.
b) Spores provide structure.
c) Spores fit into a cell.
d) Spores are specialized.

Answers

Answer:

the answer is A. Spores can travel far

Explanation:

I just took the test and got the answer right :)

Answer:

Spores can travel far.

Explanation:

Spores are carried by the wind or on animal fur.

. Which of the following could be true of two different species that have a competitive relationship in the same ecosystem? a.) One species preys on the other.
b.) The relationship is mutually beneficial.
c.) They share the same niche.
d.) One species benefits, while the other is neither helped nor harmed.

Answers

Answer:

C (they share the same niche)

Explanation:

Competition is a relationship between organisms resulting in a contest when both are trying to use the same resources related to their growth, reproduction and survivability. It is as a result of limited resources. Competition occurs in virtually all ecosystems in nature. This relationship develops when more than one organism in an environment has the same need for resources (niche) as another, to survive.

Each organism has a specific place in the ecosystem called NICHE. A species' niche is basically its ecological role or the function to which it is especially suited, which is defined by the set of conditions, resources and interactions it needs or can use.

The competitive exclusion principle says that two species can't coexist if they occupy exactly the same niche (competing for identical resources) or to put it in another way, two species in an ecosystem are bound to compete when they share the same niche (need for resources).

To warm up before a run, David begins by completing quad and hurdler's stretches. Which of these accurately evaluates his choice of warm-up activities? a ) These activities are appropriate because they prepare muscles for intense movement. B)These activities are not appropriate because the muscles stretched are not warm yet. ] c) These activities are appropriate because they make the leg muscles more flexible. D)These activities are not appropriate because they stretch muscles not used in the exercise.

Answers

I assume that the answer is A: 

The ________________ in males and the _____________________ in females are permanently blocked when an individual undergoes a sterilization procedure.a. testes; ovaries

b. testes; fallopian tubes

c. vas deferens; ovaries

d. vas deferens; fallopian tubes

Answers

Answer:

The ________________ in males and the _____________________ in females are permanently blocked when an individual undergoes a sterilization procedure.

a. testes; ovaries

b. testes; fallopian tubes

c. vas deferens; ovaries

d. vas deferens; fallopian tubes

Explanation:

I believe the answer would be B. This would be because the Fallopian tubes I think are tied which then would help so the sperm cannot go up to the ovaries. We know that it is A or B because the first answer being tested is correct.