Answer: The answer is D. All of the above
<span>Conservationists establish that the minimal viable population of a population of tigers in an extensive geographical area is 16. Given that the current population of tigers is 10, which is lower than the established minimal viable population, the tigers </span><span>will die out because they will be unable to sustain their population. </span>
It became clear in the 1970's
To transport water/nutrients to upper part of the plant
