Explain the need for a null hypothesis, especially in ecology and evolution. What does a null
hypothesis accomplish?
What will be an ideal response?
A null hypothesis is a statement of what a researcher would see if the hypothesis being tested is wrong.
Ecologists usually tackle systems that are too complex to control, so a null hypothesis anticipates, or
provides alternative hypothesis to answer questions.
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How would acidification of seawater affect marine organisms? Acidification of seawater would _____
A) increase dissolved carbonate concentrations and promote faster growth of corals and shell-building animals B) decrease dissolved carbonate concentrations and promote faster growth of corals and shell-building animals C) increase dissolved carbonate concentrations and hinder growth of corals and shell-building animals D) decrease dissolved carbonate concentrations and hinder growth of corals and shell-building animals
Which of the following types of radiation is nonionizing and has the shortest wavelength?
A) ultraviolet light B) infrared radiation C) microwaves D) X rays E) gamma rays
The monomorphic fungus Rhizopus is a(n)
A) common bread mold. B) toxic mushroom. C) opportunistic pathogen. D) true pathogen. E) common bread mold and an opportunistic pathogen.
Fish have scales that enable them to live in a water environment. This is an example of
A. metabolism. B. homeostasis. C. cellular organization. D. development. E. adaptation.