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neonofarm [45]
3 years ago
9

What best determines the health of a lake used as a source of freshwater?

Biology
2 answers:
miss Akunina [59]3 years ago
7 0
The number of pH, the closer the number it is from 7 the more fresh it is. If the pH is lower than 7, then it's acidic, and if the pH is higher than 7, then it is a base
Natali5045456 [20]3 years ago
3 0
<span>temperature and pH yup yup</span>
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Write the term for the surgical procedure that removes all or part of the external female genitalia
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Female Genital Mutilation
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Which of the following types of organism perform photosynthesis
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Answer:

Most plants, most algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth's atmosphere, and supplies all of the organic compounds and most of the energy necessary for life on Earth.

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This gland controls all other glands.
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Read 2 more answers
Pls read and answer the question
nadya68 [22]
It’s the moon jelly’s population.
8 0
2 years ago
We used new tags for the population estimate a year later. If we assume the tags stay on well over the year, what changes the pr
Naddik [55]
<h2>Mark and recapture method</h2>

Explanation:

Mark and recapture is a technique to measure the size of a population before fishing and hunting season;commonly used by fish and wildlife managers

  • It involves the marking of number of individuals in a natural population,returning them to that population followed by recapturing some of those as a basis for estimating the size of the population at the time of marking and release
  • Population size can be estimated as(N)=M*T/R

here,M=initially marked;T=total in sample second;R=marked recaptures

There are certain assumptions to this method

  • Population is assumed to be closed which means no new individuals were born or immigrated into the population and none died or emigrated from the population
  • The chance for each individual in the population to be caught are equal and constant for both the  initial marking period and the recapture period
  • One of the assumption of this method is that sufficient time must be given between the initial marking period and recapture period for all marked individuals but time period should not be very long
  • Animals do not lose their mark

The tags in the given question were estimated a year there is a chance that old marked tags population might have died or emigrated(the longer the time interval the greater the chance) and hence it becomes an "open" population which violates the first law

If proportion of population changes then marked recapture method formula won't turn out be applicable

5 0
3 years ago
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