For threshold traits, the liability for a genetic disorder is distributed among individuals in a bell-shaped curve
a. True
b. False
Indicate whether the statement is true or false
True
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In which group of organisms has the timing of spring events changed the most in response to climate change?
A) birds B) butterflies C) amphibians D) trees
Fixation of carbon is accomplished by:
a. photosynthetic organisms. b. primary consumers. c. decomposers. d. bacterial decomposers. e. burning of organic matter
Why does a sporophyte-dominant stage allow for greater diversity?
What will be an ideal response?
Given that CO2 is produced by cellular respiration, why does the amount of CO2 in the atmosphere remain relatively constant? (When answering this question, exclude the impact of human activities on atmospheric CO2.)
A) CO2 is converted to carbohydrates in photosynthesis. B) CO2 is split apart during photosynthesis. C) CO2 mostly forms carbonate rocks. D) CO2 is trapped in dead organisms' bodies.