What does the term biogenesis mean?
A) Formation of life from other sources of life
B) Formation of life from nonliving materials
C) Formation of polymers from organic monomers
D) Formation of self-replicating molecules
B
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What type of bonding holds one strand of DNA to the complementary strand of DNA?
A. Covalent B. Hydrogen C. Disulfide D. Ionic
Which of the following structures in a
flowering plant life cycle is directly formed by meiosis
a. microspores and megaspores b. sperm and eggs c. male and female gametophytes d. male and female sporophytes e. all of these structures are formed directly by meiosis
An ion is formed ____
a. during covalent bonds b. when water molecules are bound together c. when atoms exchange electrons d. when atoms share electrons equally e. when atoms share electrons unequally
During periods of rapid environmental change, what can happen to a species that was well suited to the former environment?:
A. The species may go extinct. B. Traits that were favorable in the original environment may be detrimental in the new environment. C. All of the listed responses are correct. D. Individuals with particular traits that provide an advantage in the new environment will have higher reproductive success. E. The population may change so much in adapting to the new environment that it is considered a new species