Describe allopatric speciation
In allopatric speciation, a new species arises when a small part of a population is geographically isolated from its parent population by some type of barrier. The subset of the population must adapt to somewhat different conditions, and ultimately, it becomes a new species.
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Using the diagram provided, draw in and label the following as they would appear on the December solstice. You are encouraged to use a straight edge and protractor to increase the accuracy of your diagram.
Figure 9-2: Earth–Sun relations on June solstice.
1. North and South Poles
2. Equator
3. Tropic of Cancer
4. Tropic of Capricorn
5. Circle of illumination
6. Arctic Circle
7. Antarctic Circle
Using arrows to represent incoming sunlight, show the latitudes of the following:
8. Vertical rays of the Sun
9. Tangent rays of the Sun
Earth’s mean global temperature has changed significantly over the course of our planet’s history
a. True b. False
Some indoor chemical hazard(s) are ________
A) wastewater toxicants B) PCBs C) DDT and DDE D) petroleum and toxic waste tanks tank leaks E) Radon and asbestos
Which of the following parts of the ocean are likely to support the lowest oceanic productivity?
A. areas beneath the subtropical highs B. shallow seas C. middle-to-high-latitude areas D. areas where upwelling is occurring