When an atom becomes an ion, which property changes the most?
a. atomic number
b. atomic mass
c. charge
d. half-life
c. charge
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Adventitious roots arise from a plant’s stem
a. True b. False
Viruses that kill their host cells during each cycle of infection are called
a. virulent bacteriophages. b. bacteriophages. c. temperate bacteriophages. d. phages. e. avirulent bacteriophages.
Which of the following is currently the leading cause of extinction?
a) overexploitation b) introduced species c) habitat loss d) pollution e) disease
Mendel performed a testcross with his plants and all the resulting progeny had the same colour. What information did this testcross provide?
a. The parent with the dominant trait is heterozygous. b. The parent with the dominant trait is homozygous. c. The parent with the recessive trait is heterozygous. d. The parent with the recessive trait is homozygous.