In addition to the effects of human-induced climate change, how else might permafrost in arctic settlements become unstable or damaged?
What will be an ideal response?
Arctic settlements themselves change the permafrost; thermal impacts from the built
environment such as increased thawing disturbs the foundations of homes and roads.
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The central thesis of the theory of organic evolution is that there has always been the same diversity of species on Earth in the past as today.
a. true b. false
What is the measure of a solution's acidity or alkalinity?
A. Atomic mass B. Dissolved oxygen C. Electrical charge D. pH
Which of the following describes a scenario involving pesticide drift?
A) Pesticides run off into a local waterway that flows into a nearby fishing lake, killing some of the sensitive species of fish that live in the lake. B) Pesticides leach into groundwater aquifers, sickening those who use the aquifers for drinking water. C) Pesticides being used in a mountain valley are carried by air currents into the surrounding hills, killing amphibians living in the hills' streams. D) Pesticides contain carcinogens that cause cancer in the workers using the chemicals. E) Pesticides are copied by companies producing generic varieties, but the generic varieties have greater toxic effects than the original pesticides.
Cattle and termites both have symbiotic microorganisms living in their digestive tracts that help them by
A) digesting cellulose. B) producing oxygen. C) producing large organic molecules. D) releasing large amounts of heat.