The Walker Mine Extracted the Following Tons of Coal for the Year

question 121

Short Answer

The Walker Mine extracted the following tons of coal for the year: $$\begin{array} { l l l l } \text { January } & 160 & \text { July } & 560 \\\text { February } & 220 & \text { August } & 420 \\\text { March } & 380 & \text { September } & 340 \\\text { April } & 410 & \text { October } & 220 \\\text { May } & 530 & \text { November } & 150 \\\text { June } & 600 & \text { December } & 95\end{array}$$ What was the median tonnage for the year?

Define key terms such as gene pool, genetic variation, and genotype.

Understand the impact of non-random mating on genetic variability.

Comprehend the effects of environmental changes on natural selection and allele frequencies.

Identify the processes that contribute to population genetics, including mutation, migration, and natural selection.

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Definitions:

Aldol Condensation

A chemical reaction that combines two aldehyde or ketone molecules to form a larger β-hydroxy aldehyde or β-hydroxy ketone, followed by dehydration to give a conjugated enone.

Base-Mediated Aldol Condensation

A reaction process that involves the use of a base to facilitate condensation between two carbonyl compounds, forming a β-hydroxy carbonyl compound or an α,β-unsaturated carbonyl compound.

Enolate

An anion formed by the deprotonation of an alpha-hydrogen of a carbonyl compound, important in many organic reactions.

Haloform Reaction

A chemical reaction where a haloform is produced by the halogenation of methyl ketones in the presence of base.