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givi [52]
3 years ago
10

Imagine that you are an ecologist who must determine whether an entire river and lake biome is being threatened by human activit

y. What might you look for in an indicator species?
Geography
2 answers:
AlladinOne [14]3 years ago
6 0
A biome is defined as the large ecological area where the formation of plants and animals with common characteristics gather due to the similar climates. If I were an ecologist, and i will be determining whether an entire river and lake biome is being threatened by human activity, the indicator species that i might look for are the ones that have been introduced into the biome.
MrMuchimi3 years ago
4 0
The answer is ;one that is most easily affected by changes in water quality
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slava [35]

More than 75 percent

Explanation:

Let us carefully analyze this problem:

The half life of the rubidium isotope = 50 billion years

   The half-life of a radioactive isotope is the time it takes for it to decay to half of its original amount.

  Every 50years, we know that a rubidium isotope would split into half.

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  ratio of parent to daughter = 100 : 0

When the isotope decays to half; we would have equal number of parent and daughter:

  ratio of parent to daughter at half life = 50 : 50

The age of the earth is about 4.6billion years;

this is;

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