The energy needed to destabilize existing chemical bonds and start a chemical reaction is called
A. activation energy
B. free energy
C. kinetic energy
D. potential energy
A. activation energy
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The stage of human development that occurs from implantation to about 8 weeks after fertilization is the
A. zygote. B. morula. C. gastrula. D. fetal stage. E. embryonic stage.
Removal of the heme group from hemoglobin would result in
A) red blood cells not being able to reproduce. B) white blood cells not being able to reproduce. C) an inability for blood to clot. D) red blood cells not being able to bind oxygen. E) an inability of the spleen to remove worn-out red blood cells from circulation.
Adult tunicates resemble ____and are ____
a. eels; carnivorous b. corals; photosynthetic c. starfish; carnivorous d. sponges; filter feeders e. earthworms; detritivores
The individual polypeptide chains in a multi-subunit protein each have their own primary, secondary, and tertiary structure
a. true b. false