It is likely that the protocell was
A. photoautotrophic.
B. a decomposer.
C. chemoautotrophic.
D. heterotrophic.
E. either heterotrophic or chemoautotrophic.
Answer: E
You might also like to view...
The constituents of the electron transport chain have similar capabilities, with the exception of ubiquinone (coenzyme Q). What is different about ubiquinone?
A) Ubiquinone is a protein that begins the electron transport chain, so it accepts the highest-energy electrons. B) Ubiquinone is a protein that serves as a regulator of the rate of redox reactions in the electron transport chain. C) Ubiquinone is a protein that is a constituent of all cells, prokaryotic or eukaryotic; hence its name, originating from "ubiquitous." D) Ubiquinone is not a protein, is lipid soluble, and can move through the inner mitochondrial membrane.
A horseshoe crab uses its long extended spine for what purpose?
a. defending its territory b. digging for clams c. fighting for mates d. protection from predators e. flipping itself right side up
Which of these is not a characteristic of fishes?
A. single-loop blood circulation B. gills C. pulmonary veins D. nutritional deficiencies
An Italian physician, ________, challenged the concept of spontaneous generation by demonstrating that maggots do not arise from decaying meat but rather from developing fly eggs.
Fill in the blank(s) with the appropriate word(s).