On a Trip to the Southwest,you and a Friend Collect

question 16

Multiple Choice

On a trip to the Southwest,you and a friend collect some seeds from a piñon,which is a type of pine tree.Your friend also gathers a small bagful of soil from under the piñon tree.Back home,both of you plant your seeds in commercial sterilized potting soil,but your friend adds a spoonful of the collected dirt to each of her pots.Her seedlings do better than yours.Which of the following is the likeliest reason?

• A)The soil from the Southwest probably contained fungi able to establish a mycorrhizal association with the seedlings' roots.
• B)The soil from the Southwest probably contained macronutrients missing from the potting mix.
• C)Pine seedlings are better adapted to the sandy soil of the Southwest than to commercial potting mix.
• D)The soil from the Southwest probably contained nitrogen- fixing bacteria that colonized the seedlings' root nodules.

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Definitions:

=MONTH

A function in spreadsheet programs used to extract the month portion from a given date as an integer from 1 to 12.

Date

A specific day represented in a calendar, indicating a particular time.

Difference

A point or way in which people or things are not the same; the state of being dissimilar or distinct in some aspect.

Time Entered

Time Entered denotes the specific moment data is input into a system, often tracked for records or timestamps.