Which are the three main roles played by organisms in community life?
a. producer, detritivore, decomposer
b. consumer, detritivore. decomposer
c. producer, consumer, decomposer
d. facilitator, decomposer, consumer
e. realized niche, fundamental niche, habitat
C
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A) cytosine... thymine B) guanine... adenine C) thymine... cytosine D) uracil... cytosine
Xylem tissues transport
A. organic molecules. B. sperm. C. water. D. eggs.
Miller and Urey's experiments to simulate prebiotic evolution produced
A) mitochondria and chloroplasts. B) a rich mixture of organic molecules. C) prokaryotic cells. D) large amounts of free oxygen. E) protocells.
Gloria was enjoying a soft drink but started to choke because this structure did not cover the opening in the larynx through which air passes
A) pharynx B) glottis C) larynx D) epiglottis