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kow [346]
2 years ago
8

4.

Biology
1 answer:
lana66690 [7]2 years ago
6 0

Answer:

A. ecosystem, community, population

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The area of land drained by a single river or stream is called a(n):
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Both watershed and drainage basin
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3 years ago
One way to determine the density of animals in an area is to use the mark-recapture technique. A number of individuals from a po
NNADVOKAT [17]

Answer:

N = 187.55

Explanation:

Here you just need to replace the terms and clear the equation.

You already know that,

  • First capture: 25 prairie dogs.
  • First marked animals: 25 (the whole first capture)

You let these animals leave and then you made another capture.

  • Second capture: 135 prairie dogs
  • Already Marked animals: 18 (these 18 dogs were caught in the first capture and marked before releasing them)  

To know the size of the prairie dogs population you just need to use the following equation and clear N, which is the value that you are looking for.  

Number of individual marked in first catch/Total population size, N = Number of individual marked in 2nd catch / Total number of 2nd catch

  • Number of individual marked in first catch = 25 dogs
  • Total population size, N = this is what we want to know
  • Number of individual marked in 2nd catch = 18 dogs
  • Total number of 2nd catch = 135 dogs

So now, we need to replace terms

25 / N = 18 / 135

25 / N = 0.1333

N = 25 / 0.1333

N = 187.55

4 0
3 years ago
Which statement about earths supply of fresh water is correct
vovikov84 [41]
Your answer is going to be B
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Are water and CO2 matter?
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matter is still solid liquid gas and plasma

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The initial degradation of plants by microarthropods, bacteria, and fungi occurs in the __________ soil horizon. View Available
DENIUS [597]

Answer:

O.

Explanation:

There are different types of soils and it is made up of different layers or horizon such as A, B, C, O, R and E. Together all the horizons forming soil profile. Each horizon containing different soil types.

O horizon: Known as top layer of the soil which contains layer of organic matter which is about two inches thick, and made up of humus such as decomposing leaves, dark-colored, carbon rich matter, twigs and microbial biomass which is mixed with small grained minerals for the formation of aggregate structures.

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4 years ago
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