Poison dart frogs live in the rainforest. They produce a poison by eating toxic fire ants. The only known predator is a snake, Liophis epinephelus. Which of the following factors is most likely a density-independent regulator of population growth of poison dart frogs in the rainforest?
1. clear cutting the rainforest
2. limited food source3. susceptibility to disease
4. increase in population of Liophis epinephelus

1. clear cutting the rainforest

Explanation:

A population can be regulated by density dependent or independent factors. Density dependent factors affect the size of population due to the population's density. Density independent factors show their effect irrespective of the size or density of population.

Here, clear cutting the rainforest is a human activity which will occur irrespective of the size of the frog population. As a result there will be habitat loss leading to decrease in frog population. Thus, clear cutting the rainforest is a density-independent regulator of frog population. Rest of the factors like availability of food source or vulnerability to a disease will increase or decrease according to the size of frog population.

1. clear cutting the rainforest

Explanation:

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humans, along with other animals and plants, have linear chromosomes that are arranged in pairs within the nucleus of the cell. the only human cells that do not contain pairs of chromosomes are reproductive cells, or gametes, which carry just one copy of each chromosome.