Use the Following to Answer Questions

question 82

Multiple Choice

Use the following to answer questions :
A gene family has been accumulating nucleotide substitutions at a rate of 0.25 substitutions per million years.On average,there have been 80 substitutions between the common ancestor of this gene family and each of the various living forms of this gene.
-Based on these figures,this gene family likely originated _______ million years ago.

• A) 20
• B) 80
• C) 160
• D) 200
• E) 320

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Definitions:

Developmental Path

The sequence and pattern of growth or change that occur throughout the life span of individuals, from birth to death.

Self-Esteem

An individual's subjective evaluation of their own worth, encompassing beliefs about oneself as well as emotional states, such as triumph, despair, pride, and shame.

Cognitive Development

The construction of thought processes, including remembering, problem-solving, and decision-making, from childhood through adolescence to adulthood.

Middle Childhood

A developmental stage that typically covers the period from 6 to 12 years of age, encompassing significant growth in cognitive, social, and physical areas.