A species of a large brown bear lived in Siberia about a million years ago. Over

Question

A species of a large brown bear lived in Siberia about a million years ago. Over time, the northern population became white-colored and acquired heavier fur as it blended into the snowy landscape. The southern population acquired lighter, darker-colored fur as it adapted to forest ecosystems. Eventually, they could no longer reproduce with each other. Which of these terms describes this transition? Select one: a. tra b. coincidence d. lost in translation Scientists estimate there are 14 million to 100 million species on earth. They have identified only about 2 million. Why haven't they identified more? Select one: a. The total number of species varies with the seasons. b. The total number of species changes quickly over a few years. c. We have not devoted the resources to identifying them. d. It is hard to keep count because of a rapid increase due to genetic engineering In the same field, hawks hunt during the day for mice and owls hunt during the night for mice. Which type of species interaction is this? Select one: a. commensalism b. parasitism c. interspecific competition d. mutualism e. resource partitioning

Explanation / Answer

1) e speciation. the described porcess is that of speciation due to geographical isolation.

2)b The total number of species changess quickly over a few years. This is true because new species arise while some become extinct

3)e resource partioning. This is an example of how in an area where food sources are limited and overlapping, wo species partition it between themselves

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