___________________ are organisms that derive carbon from organic compounds
A. Phototrophs
B. Autotrophs
C. Heterotrophs
D. Chemotrophs
E. Lithotrophs
Answer Key: C
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How do cells in the body of a multicellular organism communicate with each other?
a. by way of signaling molecules that interact with specific receptors b. through long projections that directly connect cells to each other c. through electrical signals passed within a cell d. by the transport of ions between cells in different parts of the organism e. by the transport of ions in water
Which plants are planted to increase the amount of nitrogen in the soil?
a. evergreens b. legumes c. mints
d. grasses e. corn
What defines a geological time period known as an era?
A) Location of the continents B) The distinct life forms that were present C) Average global temperature D) The eras represent equal divisions of time
All mutations are harmful to the cell.
Answer the following statement true (T) or false (F)