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question 57

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For several decades now, amphibian species worldwide have been in decline. A significant proportion of the decline seems to be due to the spread of the chytrid fungus, Batrachochytrium dendrobatidis (Bd) . Chytrid sporangia reside within the epidermal cells of infected animals, animals that consequently show areas of sloughed skin. They can also be lethargic, which is expressed through failure to hide and failure to flee. The infection cycle typically takes four to five days, at the end of which zoospores are released from sporangia into the environment. In some amphibian species, mortality rates approach 100%; other species seem able to survive the infection.
If infection primarily involves the outermost layers of adult amphibian skin, and if the chytrids use the skin as their sole source of nutrition, then which term best applies to the chytrids?

Definitions:

Sample Size

The number of observations or data points collected in a statistical study.

Central Limit Theorem

A statistical theory that states the distribution of the sample mean of a large enough number of independent, identically distributed variables will be approximately normal, regardless of the population's distribution.

Sample Means

The average value of a sample, which is a subset of a larger population, used to estimate the population mean.

Normally Distributed

A statistical distribution where data points are symmetrically distributed around the mean, forming a bell-shaped curve.