You Take a Large Sample of Soil and Put It

question 37

Multiple Choice

You take a large sample of soil and put it all into individual pots. You then divide the pots into two groups. In the first group, every pot of soil has been sterilized, and thus contains no bacteria. In the second group, none of the pots of soil have been sterilized. You plant soybean seeds in all the pots. What would you expect to see as the seeds sprout and grow?

• A) The plants growing in the sterile soil are bigger because they have not been exposed to any bacteria.
• B) The plants growing in the non-sterile soil are bigger because they have mutualistic associations with nitrogen-fixing bacteria.
• C) The plants growing in the sterile soil are bigger because they do not have to compete with nitrogen-fixing bacteria in order to obtain usable nitrogen.
• D) The plants growing in the non-sterile soil are bigger because saprotrophic bacteria produce nutrients for them.
• E) There is no difference in size between the plants growing in the sterile soil and those in the non-sterile soil.

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Definitions:

Underlying Security

An asset, such as a stock or bond, on which financial derivatives like options and futures are based.

Delta

In finance, it represents the ratio that compares the change in the price of an asset, usually a marketable security, to the corresponding change in the price of its derivative.

Gamma

A measure of the rate of change in an option's delta for a one-unit change in the price of the underlying asset.

Theta

In financial markets, it represents the rate of decline in the value of an option as time to expiration decreases, holding all else constant.