A Team of Scientists Is Trying to Understand the Evolutionary

question 54

Multiple Choice

A team of scientists is trying to understand the evolutionary history of three species of grasses. They hypothesize that Species T is a descendent of a hybrid between Species R and Species S. Which of the following experimental approaches would best help elucidate the evolutionary history of these three species?

• A) Hybridize Species R and S; plant the hybrid offspring in environmental conditions similar to those of Species R; follow the morphological and genetic changes in the offspring of the hybrids; and compare any observed changes to Species R.
• B) Hybridize Species R and S; plant the hybrid offspring in environmental conditions resembling those of Species R, S, and T; follow morphological and genetic changes in the offspring of the hybrids; and compare the observed changes to Species T.
• C) Sequence the DNA of all three species and determine which alleles are unique to each species.
• D) Hybridize Species R and S; induce tetraploidy in the hybrids; and compare the hybrids to Species T.

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Definitions:

Classical Conditioning

A type of learning process in which a neutral stimulus becomes associated with a meaningful stimulus, eliciting a conditioned response.

Semantic Memory

The memory of meanings, understandings, and other concept-based knowledge unrelated to specific experiences.

Episodic Memory

A kind of enduring memory that pertains to the recall of particular incidents, conditions, and personal encounters.

Procedural Memory

Procedural memory is a type of long-term memory that involves the memory of how to perform different actions and skills.