What steps are involved in having a hypothesis become an established theory?
A. A United Nations scientific panel votes on whether the hypothesis is accepted.
B. The hypothesis makes sense when explained by politicians.
C. The hypothesis is consistent with new data and investigations used to test its predictions.
D. A U.S. government agency votes on whether the hypothesis is accepted.
Answer: C
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If CO2 is added to the atmosphere faster than it can be removed, the atmosphere warms.
Answer the following statement true (T) or false (F)
Which of the following is true of immunoglobulins?
A) Only the heavy chains have variable regions. B) Only the light chains have variable regions. C) Both the light and the heavy chains have variable regions. D) Neither the light chains nor the heavy chains have variable regions.
Shrub vegetation refers to
A) low shrubs and grasses with some adaptations to semiarid conditions. B) woody plants with small, leathery evergreen leaves. C) drought resistant. D) a plant that survives seasonally unfavorable conditions underground.
More than ______________ of the planet's population now live in abject poverty and earn less than the equivalent of two US dollars per day.
-1/3 -1/8 -2/3 -1/2 -1/4