Telomere integrity in cancer cells is the result of
A) natural cell aging.
B) active telomerase activity.
C) exchange of DNA between chromosomes.
D) viral infection.
E) both choices B and C
E) both choices B and C
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Which variable will influence radioactive decay?
a. Moisture b. Temperature c. Time d. Pressure e. Chemical bonding state
A form of communication in honeybees.
Choose the letter of the best match: A. cognition B. waggle dance C. navigation D. filial imprinting E. fixed action pattern
What are the sources of sulfur in the atmosphere?
A) Mostly (over 90%) volcanoes and photosynthetic bacteria B) Mostly transportation modes, such as autos, trucks, and planes C) Volcanoes and hot springs, but mostly (about 75%) human activities such as burning coal D) Decomposition and small amounts from pollution E) Natural and human sources, in equal amounts
The phase called ______ is an interval between cell division and DNA replication. During this time, a cell synthesizes proteins, grows, and accumulates the materials needed to replicate its DNA in the next phase.
Fill in the blank(s) with the appropriate word(s).