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Please complete the following sentences using one of the following words for each blank.  A word could be used twice or not at all. Please do not capitalize any words other than names. Lamarck survive Malthus young Hutton mechanism struggle overpopulation Wallace offspring adapted old Natural Selection is a [1] for evolution, whereby organisms better [2] to their environment tend to [3] and produce more [4]. The theory was first presented by Charles Darwin.  He was influenced by [5], who believed that the Earth was very [6].  He was also influenced by [7] who believed that there is a [8] for existence.

Fossil evidence clearly shows that land mammals evolved to be ____________________________.

Differences among individuals of a species are referred to as:

Which of the following is an important concept in Darwin’s theory of evolution by natural selection? 1.  Struggle for existence 2.  Survival of the fittest 3.  Descent with modification

An insect and a bat wing are _______________ structures:

A donkey and a horse produce a mule.  What type of reproductive barrier exists:

Evolution only happens over millions of years and cannot be observed during our lifetime.

According to social learning theory, what influences behavior?

On-the-job training is best described as

Which of the following is a characteristic of adult learners?