In the 1940's, biologist Adolph Murie studied survival in Dall sheep in what is now Mount Danali National Park in Alaska
He found that Dall sheep that survive their first year of life
have a high probability of surviving until they are around 9 years old; after that, they rapidly
become easy prey for wolves and die at a very high rate. This pattern best fits a type
____ survivorship curve.
Fill in the blank with the appropriate word.
I
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You are inspired by your professor's lecture on human demography to decrease your ecological footprint. What steps would best help you accomplish this goal? Select all that apply.
_____ Carpool, walk, or bike more often. _____ Trade in your sedan for an SUV you can use for camping. _____ Start a high-protein diet that replaces refined carbohydrates with meat. _____ Eat meat-free meals at least one day a week. _____ Dress warmer and turn down the thermostat. _____ Heat your home using the fireplace instead of natural gas. _____ Take a road trip to visit all the national parks. _____ Live out in the countryside, even if your job is in the city.
A mutualism in which each species can live without the other is termed
A. a facultative mutualism. B. an obligate mutualism. C. a trophic mutualism. D. a dispersive mutualism. E. a defensive mutualism.
Allergic reactions are triggered by the production of ____ antibodies instead of ____ antibodies at the first exposure to
the allergen. a. IgA; IgD b. IgA; IgE c. IgE; IgM d. IgE; IgG e. IgG; IgE
In Drosophila, the female is the heterogametic sex
Indicate whether the statement is true or false