Suppose You Perform an Experiment in Which You Allow a Group

question 173

Multiple Choice

Suppose you perform an experiment in which you allow a group of babies to suck on one of two different pacifiers. Some babies sucked on the one that was smooth and round and other babies sucked on the pacifier that had ridges on it and was oblong. Later, you show both pacifiers to the babies. Generalizing from similar research reported in the text, you would expect that the babies would look:

• A) longer at the pacifier that they had sucked on
• B) longer at the pacifier that was "new"
• C) equally long at both pacifiers
• D) at neither pacifier, since sucking on a "weird" pacifier was unpleasant for them

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Definitions:

Saccharomyces

A genus of fungi that includes many yeast species, widely used in baking, brewing, and wine-making.

Arbuscular Mycorrhizae

A type of symbiotic relationship between plants and fungi, where the fungus invades the plant roots to enhance nutrient and water absorption.

Endomycorrhizae

A type of mycorrhiza in which the fungus penetrates the cortical cells of the roots of a vascular plant, enhancing nutrient exchange.

Mycorrhizal Associations

Symbiotic relationships between the roots of plants and fungi, helping plants to absorb nutrients more efficiently from the soil.